diff --git a/composer.lock b/composer.lock
index 608ce65..a8a9610 100644
--- a/composer.lock
+++ b/composer.lock
@@ -348,7 +348,7 @@
             "source": {
                 "type": "git",
                 "url": "https://git.flash.moe/flash/index.git",
-                "reference": "4aae77900be26fccb23a7508744ef17d6b217e5f"
+                "reference": "557f089ff79c3806f1973ee7bf82f81ab4faa5f4"
             },
             "require": {
                 "ext-mbstring": "*",
@@ -386,7 +386,7 @@
             ],
             "description": "Composer package for the common library for my projects.",
             "homepage": "https://railgun.sh/index",
-            "time": "2023-07-21T21:47:41+00:00"
+            "time": "2023-07-22T14:25:58+00:00"
         },
         {
             "name": "matomo/device-detector",
diff --git a/public-legacy/auth/login.php b/public-legacy/auth/login.php
index 3075380..e12e24b 100644
--- a/public-legacy/auth/login.php
+++ b/public-legacy/auth/login.php
@@ -1,13 +1,12 @@
 <?php
 namespace Misuzu;
 
+use RuntimeException;
 use Misuzu\AuthToken;
 use Misuzu\Users\User;
-use Misuzu\Users\UserNotFoundException;
 use Misuzu\Users\UserAuthSession;
 use Misuzu\Users\UserLoginAttempt;
 use Misuzu\Users\UserSession;
-use Misuzu\Users\UserSessionCreationFailedException;
 
 if(UserSession::hasCurrent()) {
     url_redirect('index');
@@ -20,7 +19,7 @@ if(!empty($_GET['resolve'])) {
     try {
         // Only works for usernames, this is by design
         $userInfo = User::byUsername((string)filter_input(INPUT_GET, 'name'));
-    } catch(UserNotFoundException $ex) {
+    } catch(RuntimeException $ex) {
         echo json_encode([
             'id' => 0,
             'name' => '',
@@ -90,7 +89,7 @@ while(!empty($_POST['login']) && is_array($_POST['login'])) {
 
     try {
         $userInfo = User::byUsernameOrEMailAddress($_POST['login']['username']);
-    } catch(UserNotFoundException $ex) {
+    } catch(RuntimeException $ex) {
         UserLoginAttempt::create($ipAddress, $countryCode, false);
         $notices[] = $loginFailedError;
         break;
@@ -128,7 +127,7 @@ while(!empty($_POST['login']) && is_array($_POST['login'])) {
     try {
         $sessionInfo = UserSession::create($userInfo, $ipAddress, $countryCode);
         $sessionInfo->setCurrent();
-    } catch(UserSessionCreationFailedException $ex) {
+    } catch(RuntimeException $ex) {
         $notices[] = "Something broke while creating a session for you, please tell an administrator or developer about this!";
         break;
     }
diff --git a/public-legacy/auth/password.php b/public-legacy/auth/password.php
index 118abd4..3adb645 100644
--- a/public-legacy/auth/password.php
+++ b/public-legacy/auth/password.php
@@ -1,12 +1,10 @@
 <?php
 namespace Misuzu;
 
+use RuntimeException;
 use Misuzu\Users\User;
-use Misuzu\Users\UserNotFoundException;
 use Misuzu\Users\UserLoginAttempt;
 use Misuzu\Users\UserRecoveryToken;
-use Misuzu\Users\UserRecoveryTokenNotFoundException;
-use Misuzu\Users\UserRecoveryTokenCreationFailedException;
 use Misuzu\Users\UserSession;
 
 if(UserSession::hasCurrent()) {
@@ -23,7 +21,7 @@ $userId = !empty($reset['user']) ? (int)$reset['user'] : (
 if($userId > 0)
     try {
         $userInfo = User::byId($userId);
-    } catch(UserNotFoundException $ex) {
+    } catch(RuntimeException $ex) {
         url_redirect('auth-forgot');
         return;
     }
@@ -45,7 +43,7 @@ while($canResetPassword) {
 
         try {
             $tokenInfo = UserRecoveryToken::byToken($verificationCode);
-        } catch(UserRecoveryTokenNotFoundException $ex) {
+        } catch(RuntimeException $ex) {
             unset($tokenInfo);
         }
 
@@ -101,7 +99,7 @@ while($canResetPassword) {
 
         try {
             $forgotUser = User::byEMailAddress($forgot['email']);
-        } catch(UserNotFoundException $ex) {
+        } catch(RuntimeException $ex) {
             unset($forgotUser);
         }
 
@@ -112,7 +110,7 @@ while($canResetPassword) {
 
         try {
             $tokenInfo = UserRecoveryToken::byUserAndRemoteAddress($forgotUser, $ipAddress);
-        } catch(UserRecoveryTokenNotFoundException $ex) {
+        } catch(RuntimeException $ex) {
             $tokenInfo = UserRecoveryToken::create($forgotUser, $ipAddress);
 
             $recoveryMessage = Mailer::template('password-recovery', [
diff --git a/public-legacy/auth/register.php b/public-legacy/auth/register.php
index f6500df..e832450 100644
--- a/public-legacy/auth/register.php
+++ b/public-legacy/auth/register.php
@@ -1,8 +1,8 @@
 <?php
 namespace Misuzu;
 
+use RuntimeException;
 use Misuzu\Users\User;
-use Misuzu\Users\UserCreationFailedException;
 use Misuzu\Users\UserLoginAttempt;
 use Misuzu\Users\UserRole;
 use Misuzu\Users\UserSession;
@@ -80,7 +80,7 @@ while(!$restricted && !empty($register)) {
             $ipAddress,
             $countryCode
         );
-    } catch(UserCreationFailedException $ex) {
+    } catch(RuntimeException $ex) {
         $notices[] = 'Something went wrong while creating your account, please alert an administrator or a developer about this!';
         break;
     }
diff --git a/public-legacy/auth/twofactor.php b/public-legacy/auth/twofactor.php
index 7c1877d..0c9a0b5 100644
--- a/public-legacy/auth/twofactor.php
+++ b/public-legacy/auth/twofactor.php
@@ -1,12 +1,11 @@
 <?php
 namespace Misuzu;
 
+use RuntimeException;
 use Misuzu\Users\User;
 use Misuzu\Users\UserLoginAttempt;
 use Misuzu\Users\UserSession;
-use Misuzu\Users\UserSessionCreationFailedException;
 use Misuzu\Users\UserAuthSession;
-use Misuzu\Users\UserAuthSessionNotFoundException;
 
 if(UserSession::hasCurrent()) {
     url_redirect('index');
@@ -25,7 +24,7 @@ try {
             !empty($twofactor['token']) && is_string($twofactor['token']) ? $twofactor['token'] : ''
         )
     );
-} catch(UserAuthSessionNotFoundException $ex) {}
+} catch(RuntimeException $ex) {}
 
 if(empty($tokenInfo) || $tokenInfo->hasExpired()) {
     url_redirect('auth-login');
@@ -76,7 +75,7 @@ while(!empty($twofactor)) {
     try {
         $sessionInfo = UserSession::create($userInfo, $ipAddress, $countryCode);
         $sessionInfo->setCurrent();
-    } catch(UserSessionCreationFailedException $ex) {
+    } catch(RuntimeException $ex) {
         $notices[] = "Something broke while creating a session for you, please tell an administrator or developer about this!";
         break;
     }
diff --git a/public-legacy/manage/changelog/change.php b/public-legacy/manage/changelog/change.php
index 00be592..4093762 100644
--- a/public-legacy/manage/changelog/change.php
+++ b/public-legacy/manage/changelog/change.php
@@ -6,7 +6,6 @@ use RuntimeException;
 use Index\DateTime;
 use Misuzu\Changelog\Changelog;
 use Misuzu\Users\User;
-use Misuzu\Users\UserNotFoundException;
 
 if(!User::hasCurrent() || !perms_check_user(MSZ_PERMS_CHANGELOG, User::getCurrent()->getId(), MSZ_PERM_CHANGELOG_MANAGE_CHANGES)) {
     echo render_error(403);
diff --git a/public-legacy/manage/changelog/index.php b/public-legacy/manage/changelog/index.php
index d6d7dc8..b1756ab 100644
--- a/public-legacy/manage/changelog/index.php
+++ b/public-legacy/manage/changelog/index.php
@@ -1,6 +1,7 @@
 <?php
 namespace Misuzu;
 
+use RuntimeException;
 use Misuzu\Users\User;
 
 if(!User::hasCurrent() || !perms_check_user(MSZ_PERMS_CHANGELOG, User::getCurrent()->getId(), MSZ_PERM_CHANGELOG_MANAGE_CHANGES)) {
@@ -28,7 +29,7 @@ foreach($changeInfos as $changeInfo) {
     } else {
         try {
             $userInfo = User::byId($userId);
-        } catch(UserNotFoundException $ex) {
+        } catch(RuntimeException $ex) {
             $userInfo = null;
         }
 
diff --git a/public-legacy/manage/users/role.php b/public-legacy/manage/users/role.php
index 9902194..30e3321 100644
--- a/public-legacy/manage/users/role.php
+++ b/public-legacy/manage/users/role.php
@@ -1,11 +1,11 @@
 <?php
 namespace Misuzu;
 
+use RuntimeException;
 use Index\Colour\Colour;
 use Index\Colour\ColourRGB;
 use Misuzu\Users\User;
 use Misuzu\Users\UserRole;
-use Misuzu\Users\UserRoleNotFoundException;
 
 if(!User::hasCurrent() || !perms_check_user(MSZ_PERMS_USER, User::getCurrent()->getId(), MSZ_PERM_USER_MANAGE_ROLES)) {
     echo render_error(403);
@@ -17,7 +17,7 @@ $roleId = (int)filter_input(INPUT_GET, 'r', FILTER_SANITIZE_NUMBER_INT);
 if($roleId > 0)
     try {
         $roleInfo = UserRole::byId($roleId);
-    } catch(UserRoleNotFoundException $ex) {
+    } catch(RuntimeException $ex) {
         echo render_error(404);
         return;
     }
diff --git a/public-legacy/manage/users/user.php b/public-legacy/manage/users/user.php
index fd4cd59..6cef5c2 100644
--- a/public-legacy/manage/users/user.php
+++ b/public-legacy/manage/users/user.php
@@ -1,11 +1,10 @@
 <?php
 namespace Misuzu;
 
+use RuntimeException;
 use Index\Colour\Colour;
 use Misuzu\Users\User;
-use Misuzu\Users\UserNotFoundException;
 use Misuzu\Users\UserRole;
-use Misuzu\Users\UserRoleNotFoundException;
 
 if(!User::hasCurrent() || !perms_check_user(MSZ_PERMS_USER, User::getCurrent()->getId(), MSZ_PERM_USER_MANAGE_USERS)) {
     echo render_error(403);
@@ -19,7 +18,7 @@ $currentUserId = $currentUser->getId();
 
 try {
     $userInfo = User::byId($userId);
-} catch(UserNotFoundException $ex) {
+} catch(RuntimeException $ex) {
     echo render_error(404);
     return;
 }
@@ -94,7 +93,7 @@ if(CSRF::validateRequest() && $canEdit) {
         foreach($applyRoles as $roleId) {
             try {
                 $role = $existingRoles[$roleId] ?? UserRole::byId($roleId);
-            } catch(UserRoleNotFoundException $ex) {
+            } catch(RuntimeException $ex) {
                 continue;
             }
             if(!$currentUser->hasAuthorityOver($role))
@@ -118,7 +117,7 @@ if(CSRF::validateRequest() && $canEdit) {
 
         try {
             $userInfo->setDisplayRole(UserRole::byId($displayRole));
-        } catch(UserRoleNotFoundException $ex) {}
+        } catch(RuntimeException $ex) {}
 
         $countryValidation = strlen($setCountry) === 2
             && ctype_alpha($setCountry)
diff --git a/public-legacy/manage/users/warnings.php b/public-legacy/manage/users/warnings.php
index 86bb547..d9ee50f 100644
--- a/public-legacy/manage/users/warnings.php
+++ b/public-legacy/manage/users/warnings.php
@@ -1,12 +1,10 @@
 <?php
 namespace Misuzu;
 
+use RuntimeException;
 use InvalidArgumentException;
 use Misuzu\Users\User;
-use Misuzu\Users\UserNotFoundException;
 use Misuzu\Users\UserWarning;
-use Misuzu\Users\UserWarningNotFoundException;
-use Misuzu\Users\UserWarningCreationFailedException;
 
 if(!User::hasCurrent() || !perms_check_user(MSZ_PERMS_USER, User::getCurrent()->getId(), MSZ_PERM_USER_MANAGE_WARNINGS)) {
     echo render_error(403);
@@ -20,7 +18,7 @@ $currentUserId = $currentUser->getId();
 if(!empty($_POST['lookup']) && is_string($_POST['lookup'])) {
     try {
         $userId = User::byUsername((string)filter_input(INPUT_POST, 'lookup'))->getId();
-    } catch(UserNotFoundException $ex) {
+    } catch(RuntimeException $ex) {
         $userId = 0;
     }
     url_redirect('manage-users-warnings', ['user' => $userId]);
@@ -32,7 +30,7 @@ if(!empty($_POST['lookup']) && is_string($_POST['lookup'])) {
 if(!empty($_GET['delete'])) {
     try {
         UserWarning::byId((int)filter_input(INPUT_GET, 'w', FILTER_SANITIZE_NUMBER_INT))->delete();
-    } catch(UserWarningNotFoundException $ex) {}
+    } catch(RuntimeException $ex) {}
     redirect($_SERVER['HTTP_REFERER'] ?? url('manage-users-warnings'));
     return;
 }
@@ -79,7 +77,7 @@ if(!empty($_POST['warning']) && is_array($_POST['warning'])) {
 
         if(!$currentUser->hasAuthorityOver($warningsUserInfo))
             $notices[] = 'You do not have authority over this user.';
-    } catch(UserNotFoundException $ex) {
+    } catch(RuntimeException $ex) {
         $notices[] = 'This user doesn\'t exist.';
     }
 
@@ -96,7 +94,7 @@ if(!empty($_POST['warning']) && is_array($_POST['warning'])) {
             );
         } catch(InvalidArgumentException $ex) {
             $notices[] = $ex->getMessage();
-        } catch(UserWarningCreationFailedException $ex) {
+        } catch(RuntimeException $ex) {
             $notices[] = 'Warning creation failed.';
         }
     }
@@ -108,7 +106,7 @@ if(empty($warningsUser))
 if(empty($warningsUserInfo))
     try {
         $warningsUserInfo = User::byId($warningsUser);
-    } catch(UserNotFoundException $ex) {
+    } catch(RuntimeException $ex) {
         $warningsUserInfo = null;
     }
 
diff --git a/public-legacy/members.php b/public-legacy/members.php
index e0208ca..1e936a0 100644
--- a/public-legacy/members.php
+++ b/public-legacy/members.php
@@ -1,9 +1,9 @@
 <?php
 namespace Misuzu;
 
+use RuntimeException;
 use Misuzu\Users\User;
 use Misuzu\Users\UserRole;
-use Misuzu\Users\UserRoleNotFoundException;
 
 $roleId = !empty($_GET['r']) && is_string($_GET['r']) ? (int)$_GET['r'] : UserRole::DEFAULT;
 $orderBy = !empty($_GET['ss']) && is_string($_GET['ss']) ? mb_strtolower($_GET['ss']) : '';
@@ -71,7 +71,7 @@ $canManageUsers = perms_check_user(MSZ_PERMS_USER, User::hasCurrent() ? User::ge
 
 try {
     $roleInfo = UserRole::byId($roleId);
-} catch(UserRoleNotFoundException $ex) {
+} catch(RuntimeException $ex) {
     echo render_error(404);
     return;
 }
diff --git a/public-legacy/profile.php b/public-legacy/profile.php
index 2285235..fe3916e 100644
--- a/public-legacy/profile.php
+++ b/public-legacy/profile.php
@@ -2,18 +2,13 @@
 namespace Misuzu;
 
 use InvalidArgumentException;
+use RuntimeException;
 use Index\ByteFormat;
 use Misuzu\Parsers\Parser;
 use Misuzu\Profile\ProfileFields;
 use Misuzu\Users\User;
-use Misuzu\Users\UserNotFoundException;
 use Misuzu\Users\UserSession;
 use Misuzu\Users\Assets\UserBackgroundAsset;
-use Misuzu\Users\Assets\UserImageAssetException;
-use Misuzu\Users\Assets\UserImageAssetInvalidImageException;
-use Misuzu\Users\Assets\UserImageAssetInvalidTypeException;
-use Misuzu\Users\Assets\UserImageAssetInvalidDimensionsException;
-use Misuzu\Users\Assets\UserImageAssetFileTooLargeException;
 
 $userId = !empty($_GET['u']) && is_string($_GET['u']) ? trim($_GET['u']) : 0;
 $profileMode = !empty($_GET['m']) && is_string($_GET['m']) ? (string)$_GET['m'] : '';
@@ -21,7 +16,7 @@ $isEditing = !empty($_GET['edit']) && is_string($_GET['edit']) ? (bool)$_GET['ed
 
 try {
     $profileUser = User::findForProfile($userId);
-} catch(UserNotFoundException $ex) {
+} catch(RuntimeException $ex) {
     http_response_code(404);
     Template::render('profile.index');
     return;
@@ -211,15 +206,16 @@ if($isEditing) {
                         } else {
                             try {
                                 $avatarInfo->setFromPath($_FILES['avatar']['tmp_name']['file']);
-                            } catch(UserImageAssetInvalidImageException $ex) {
-                                $notices[] = 'The file you uploaded was not an image!';
-                            } catch(UserImageAssetInvalidTypeException $ex) {
-                                $notices[] = 'This type of image is not supported, keep to PNG, JPG or GIF!';
-                            } catch(UserImageAssetInvalidDimensionsException $ex) {
-                                $notices[] = sprintf('Your avatar can\'t be larger than %dx%d!', $avatarInfo->getMaxWidth(), $avatarInfo->getMaxHeight());
-                            } catch(UserImageAssetFileTooLargeException $ex) {
-                                $notices[] = sprintf('Your avatar is not allowed to be larger in file size than %s!', ByteFormat::format($avatarInfo->getMaxBytes()));
-                            } catch(UserImageAssetException $ex) {
+                            } catch(InvalidArgumentException $ex) {
+                                $exMessage = $ex->getMessage();
+                                $notices[] = match($exMessage) {
+                                    '$path is not a valid image.' => 'The file you uploaded was not an image!',
+                                    '$path is not an allowed image file.' => 'This type of image is not supported, keep to PNG, JPG or GIF!',
+                                    'Dimensions of $path are too large.' => sprintf('Your avatar can\'t be larger than %dx%d!', $avatarInfo->getMaxWidth(), $avatarInfo->getMaxHeight()),
+                                    'File size of $path is too large.' => sprintf('Your avatar is not allowed to be larger in file size than %s!', ByteFormat::format($avatarInfo->getMaxBytes())),
+                                    default => $exMessage,
+                                };
+                            } catch(RuntimeException $ex) {
                                 $notices[] = 'Unable to save your avatar, contact an administator!';
                             }
                         }
@@ -256,15 +252,16 @@ if($isEditing) {
                             } else {
                                 try {
                                     $backgroundInfo->setFromPath($_FILES['background']['tmp_name']['file']);
-                                } catch(UserImageAssetInvalidImageException $ex) {
-                                    $notices[] = 'The file you uploaded was not an image!';
-                                } catch(UserImageAssetInvalidTypeException $ex) {
-                                    $notices[] = 'This type of image is not supported, keep to PNG, JPG or GIF!';
-                                } catch(UserImageAssetInvalidDimensionsException $ex) {
-                                    $notices[] = sprintf('Your background can\'t be larger than %dx%d!', $backgroundInfo->getMaxWidth(), $backgroundInfo->getMaxHeight());
-                                } catch(UserImageAssetFileTooLargeException $ex) {
-                                    $notices[] = sprintf('Your background is not allowed to be larger in file size than %2$s!', ByteFormat::format($backgroundInfo->getMaxBytes()));
-                                } catch(UserImageAssetException $ex) {
+                                } catch(InvalidArgumentException $ex) {
+                                    $exMessage = $ex->getMessage();
+                                    $notices[] = match($exMessage) {
+                                        '$path is not a valid image.' => 'The file you uploaded was not an image!',
+                                        '$path is not an allowed image file.' => 'This type of image is not supported, keep to PNG, JPG or GIF!',
+                                        'Dimensions of $path are too large.' => sprintf('Your background can\'t be larger than %dx%d!', $backgroundInfo->getMaxWidth(), $backgroundInfo->getMaxHeight()),
+                                        'File size of $path is too large.' => sprintf('Your background is not allowed to be larger in file size than %2$s!', ByteFormat::format($backgroundInfo->getMaxBytes())),
+                                        default => $exMessage,
+                                    };
+                                } catch(RuntimeException $ex) {
                                     $notices[] = 'Unable to save your background, contact an administator!';
                                 }
                             }
diff --git a/public-legacy/search.php b/public-legacy/search.php
index 298609a..a095f50 100644
--- a/public-legacy/search.php
+++ b/public-legacy/search.php
@@ -28,7 +28,7 @@ if(!empty($searchQuery)) {
         } else {
             try {
                 $userInfo = User::byId($userId);
-            } catch(UserNotFoundException $ex) {
+            } catch(RuntimeException $ex) {
                 $userInfo = null;
             }
 
diff --git a/public-legacy/settings/account.php b/public-legacy/settings/account.php
index 7a76580..4b65953 100644
--- a/public-legacy/settings/account.php
+++ b/public-legacy/settings/account.php
@@ -1,9 +1,9 @@
 <?php
 namespace Misuzu;
 
+use RuntimeException;
 use Misuzu\Users\User;
 use Misuzu\Users\UserRole;
-use Misuzu\Users\UserRoleNotFoundException;
 use Misuzu\Users\UserSession;
 use chillerlan\QRCode\QRCode;
 use chillerlan\QRCode\QROptions;
@@ -22,7 +22,7 @@ $isVerifiedRequest = CSRF::validateRequest();
 if(!$isRestricted && $isVerifiedRequest && !empty($_POST['role'])) {
     try {
         $roleInfo = UserRole::byId((int)($_POST['role']['id'] ?? 0));
-    } catch(UserRoleNotFoundException $ex) {}
+    } catch(RuntimeException $ex) {}
 
     if(empty($roleInfo) || !$currentUser->hasRole($roleInfo))
         $errors[] = "You're trying to modify a role that hasn't been assigned to you.";
diff --git a/public-legacy/settings/sessions.php b/public-legacy/settings/sessions.php
index fca07b1..f8f94ed 100644
--- a/public-legacy/settings/sessions.php
+++ b/public-legacy/settings/sessions.php
@@ -1,9 +1,9 @@
 <?php
 namespace Misuzu;
 
+use RuntimeException;
 use Misuzu\Users\User;
 use Misuzu\Users\UserSession;
-use Misuzu\Users\UserSessionNotFoundException;
 
 if(!User::hasCurrent()) {
     echo render_error(401);
@@ -25,7 +25,7 @@ if(!empty($_POST['session']) && CSRF::validateRequest()) {
 
             try {
                 $sessionInfo = UserSession::byId($sessionId);
-            } catch(UserSessionNotFoundException $ex) {}
+            } catch(RuntimeException $ex) {}
 
             if(empty($sessionInfo) || $sessionInfo->getUserId() !== $currentUser->getId()) {
                 $errors[] = "Session #{$sessionId} does not exist.";
diff --git a/public/index.php b/public/index.php
index 7070456..ceeb450 100644
--- a/public/index.php
+++ b/public/index.php
@@ -1,10 +1,9 @@
 <?php
 namespace Misuzu;
 
+use RuntimeException;
 use Misuzu\Users\User;
-use Misuzu\Users\UserNotFoundException;
 use Misuzu\Users\UserSession;
-use Misuzu\Users\UserSessionNotFoundException;
 
 require_once __DIR__ . '/../misuzu.php';
 
@@ -118,7 +117,7 @@ if($authToken->isValid()) {
 
                     try {
                         $userInfo = User::byId($authToken->getImpersonatedUserId());
-                    } catch(UserNotFoundException $ex) {
+                    } catch(RuntimeException $ex) {
                         $userInfo = $userInfoReal;
                         $authToken->removeImpersonatedUserId();
                         $authToken->applyCookie();
@@ -128,10 +127,7 @@ if($authToken->isValid()) {
                 }
             }
         }
-    } catch(UserNotFoundException $ex) {
-        UserSession::unsetCurrent();
-        User::unsetCurrent();
-    } catch(UserSessionNotFoundException $ex) {
+    } catch(RuntimeException $ex) {
         UserSession::unsetCurrent();
         User::unsetCurrent();
     }
diff --git a/src/AuditLog/AuditLog.php b/src/AuditLog/AuditLog.php
index faf2407..0ba029a 100644
--- a/src/AuditLog/AuditLog.php
+++ b/src/AuditLog/AuditLog.php
@@ -2,7 +2,6 @@
 namespace Misuzu\AuditLog;
 
 use InvalidArgumentException;
-use RuntimeException;
 use Index\Data\DbStatementCache;
 use Index\Data\IDbConnection;
 use Index\Data\IDbResult;
diff --git a/src/Comments/CommentsEx.php b/src/Comments/CommentsEx.php
index ff8dcdb..b89dddd 100644
--- a/src/Comments/CommentsEx.php
+++ b/src/Comments/CommentsEx.php
@@ -2,8 +2,8 @@
 namespace Misuzu\Comments;
 
 use stdClass;
+use RuntimeException;
 use Misuzu\Users\User;
-use Misuzu\Users\UserNotFoundException;
 
 class CommentsEx {
     private Comments $comments;
@@ -38,7 +38,7 @@ class CommentsEx {
             } else {
                 try {
                     $userInfo = User::byId($userId);
-                } catch(UserNotFoundException $ex) {
+                } catch(RuntimeException $ex) {
                     $userInfo = null;
                 }
 
diff --git a/src/Comments/CommentsParser.php b/src/Comments/CommentsParser.php
index de460f0..9017dca 100644
--- a/src/Comments/CommentsParser.php
+++ b/src/Comments/CommentsParser.php
@@ -1,9 +1,9 @@
 <?php
 namespace Misuzu\Comments;
 
+use RuntimeException;
 use Misuzu\DB;
 use Misuzu\Users\User;
-use Misuzu\Users\UserNotFoundException;
 
 class CommentsParser {
     private const MARKUP_USERNAME = '#\B(?:@{1}(' . User::NAME_REGEX . '))#u';
@@ -13,7 +13,7 @@ class CommentsParser {
         return preg_replace_callback(self::MARKUP_USERNAME, function ($matches) {
             try {
                 return sprintf('@@%d', User::byUsername($matches[1])->getId());
-            } catch(UserNotFoundException $ex) {
+            } catch(RuntimeException $ex) {
                 return $matches[0];
             }
         }, $text);
diff --git a/src/Feeds/Feed.php b/src/Feeds/Feed.php
index 2c4b7c1..ad59392 100644
--- a/src/Feeds/Feed.php
+++ b/src/Feeds/Feed.php
@@ -1,8 +1,6 @@
 <?php
 namespace Misuzu\Feeds;
 
-use InvalidArgumentException;
-
 class Feed {
     private string $title = '';
     private ?string $description = null;
diff --git a/src/Http/Handlers/AssetsHandler.php b/src/Http/Handlers/AssetsHandler.php
index 9494f1e..40bef83 100644
--- a/src/Http/Handlers/AssetsHandler.php
+++ b/src/Http/Handlers/AssetsHandler.php
@@ -1,9 +1,9 @@
 <?php
 namespace Misuzu\Http\Handlers;
 
+use RuntimeException;
 use Misuzu\GitInfo;
 use Misuzu\Users\User;
-use Misuzu\Users\UserNotFoundException;
 use Misuzu\Users\Assets\StaticUserImageAsset;
 use Misuzu\Users\Assets\UserImageAssetInterface;
 use Misuzu\Users\Assets\UserAssetScalableInterface;
@@ -55,7 +55,7 @@ final class AssetsHandler extends Handler {
             } elseif($userInfo->hasAvatar()) {
                 $assetInfo = $userInfo->getAvatarInfo();
             }
-        } catch(UserNotFoundException $ex) {}
+        } catch(RuntimeException $ex) {}
 
         $this->serveUserAsset($response, $request, $assetInfo);
     }
@@ -69,7 +69,7 @@ final class AssetsHandler extends Handler {
 
         try {
             $userInfo = User::byId($userId);
-        } catch(UserNotFoundException $ex) {}
+        } catch(RuntimeException $ex) {}
 
         if(empty($userInfo) || !$userInfo->hasBackground() || !$this->canViewAsset($request, $userInfo)) {
             $response->setContent('');
diff --git a/src/Http/Handlers/ChangelogHandler.php b/src/Http/Handlers/ChangelogHandler.php
index 58721c5..83a7633 100644
--- a/src/Http/Handlers/ChangelogHandler.php
+++ b/src/Http/Handlers/ChangelogHandler.php
@@ -11,7 +11,6 @@ use Misuzu\Feeds\FeedItem;
 use Misuzu\Feeds\AtomFeedSerializer;
 use Misuzu\Feeds\RssFeedSerializer;
 use Misuzu\Users\User;
-use Misuzu\Users\UserNotFoundException;
 
 class ChangelogHandler extends Handler {
     private array $userInfos = [];
@@ -34,7 +33,7 @@ class ChangelogHandler extends Handler {
         if($filterUser > 0)
             try {
                 $filterUser = User::byId($filterUser);
-            } catch(UserNotFoundException $ex) {
+            } catch(RuntimeException $ex) {
                 return 404;
             }
         else
@@ -68,7 +67,7 @@ class ChangelogHandler extends Handler {
             } else {
                 try {
                     $userInfo = User::byId($userId);
-                } catch(UserNotFoundException $ex) {
+                } catch(RuntimeException $ex) {
                     $userInfo = null;
                 }
 
@@ -105,7 +104,7 @@ class ChangelogHandler extends Handler {
 
         try {
             $userInfo = User::byId($changeInfo->getUserId());
-        } catch(UserNotFoundException $ex) {
+        } catch(RuntimeException $ex) {
             $userInfo = null;
         }
 
diff --git a/src/Http/Handlers/HomeHandler.php b/src/Http/Handlers/HomeHandler.php
index d3ff0ce..787f12a 100644
--- a/src/Http/Handlers/HomeHandler.php
+++ b/src/Http/Handlers/HomeHandler.php
@@ -8,7 +8,6 @@ use Misuzu\Template;
 use Misuzu\Comments\CommentsCategory;
 use Misuzu\Users\User;
 use Misuzu\Users\UserSession;
-use Misuzu\Users\UserNotFoundException;
 
 final class HomeHandler extends Handler {
     public function index($response, $request): void {
@@ -132,7 +131,7 @@ final class HomeHandler extends Handler {
             } else {
                 try {
                     $userInfo = User::byId($userId);
-                } catch(UserNotFoundException $ex) {
+                } catch(RuntimeException $ex) {
                     $userInfo = null;
                 }
 
diff --git a/src/Http/Handlers/NewsHandler.php b/src/Http/Handlers/NewsHandler.php
index 651dde6..c0d19a0 100644
--- a/src/Http/Handlers/NewsHandler.php
+++ b/src/Http/Handlers/NewsHandler.php
@@ -14,7 +14,6 @@ use Misuzu\Feeds\RssFeedSerializer;
 use Misuzu\News\NewsCategoryInfo;
 use Misuzu\Parsers\Parser;
 use Misuzu\Users\User;
-use Misuzu\Users\UserNotFoundException;
 
 final class NewsHandler extends Handler {
     private function fetchPostInfo(array $postInfos, array $categoryInfos = []): array {
@@ -32,7 +31,7 @@ final class NewsHandler extends Handler {
             } else {
                 try {
                     $userInfo = User::byId($userId);
-                } catch(UserNotFoundException $ex) {
+                } catch(RuntimeException $ex) {
                     $userInfo = null;
                 }
 
@@ -138,7 +137,7 @@ final class NewsHandler extends Handler {
         if($postInfo->hasUserId())
             try {
                 $userInfo = User::byId($postInfo->getUserId());
-            } catch(UserNotFoundException $ex) {}
+            } catch(RuntimeException $ex) {}
 
         $comments = new CommentsEx($comments);
 
@@ -208,7 +207,7 @@ final class NewsHandler extends Handler {
             } else {
                 try {
                     $userInfo = User::byId($userId);
-                } catch(UserNotFoundException $ex) {
+                } catch(RuntimeException $ex) {
                     $userInfo = null;
                 }
 
diff --git a/src/Mailer.php b/src/Mailer.php
index bfd7378..0274ba3 100644
--- a/src/Mailer.php
+++ b/src/Mailer.php
@@ -5,9 +5,7 @@ use InvalidArgumentException;
 use Misuzu\Config\IConfig;
 use Symfony\Component\Mime\Email as SymfonyMessage;
 use Symfony\Component\Mime\Address as SymfonyAddress;
-use Symfony\Component\Mailer\Mailer as SymfonyMailer;
 use Symfony\Component\Mailer\Transport as SymfonyTransport;
-use Symfony\Component\Mailer\Exception\TransportExceptionInterface;
 
 final class Mailer {
     private const TEMPLATE_PATH = MSZ_ROOT . '/config/emails/%s.txt';
diff --git a/src/SharpChat/SharpChatRoutes.php b/src/SharpChat/SharpChatRoutes.php
index 38b292d..ca00501 100644
--- a/src/SharpChat/SharpChatRoutes.php
+++ b/src/SharpChat/SharpChatRoutes.php
@@ -1,6 +1,7 @@
 <?php
 namespace Misuzu\SharpChat;
 
+use RuntimeException;
 use Index\Colour\Colour;
 use Index\Routing\IRouter;
 use Index\Http\HttpFx;
@@ -12,9 +13,6 @@ use Misuzu\Emoticons\Emotes;
 use Misuzu\Users\User;
 use Misuzu\Users\UserSession;
 use Misuzu\Users\UserWarning;
-use Misuzu\Users\UserNotFoundException;
-use Misuzu\Users\UserWarningCreationFailedException;
-use Misuzu\Users\UserSessionNotFoundException;
 
 final class SharpChatRoutes {
     private IConfig $config;
@@ -199,7 +197,7 @@ final class SharpChatRoutes {
 
             try {
                 $sessionInfo = UserSession::byToken($authToken);
-            } catch(UserSessionNotFoundException $ex) {
+            } catch(RuntimeException $ex) {
                 return ['success' => false, 'reason' => 'token'];
             }
 
@@ -216,7 +214,7 @@ final class SharpChatRoutes {
 
                 try {
                     $userInfo = User::byId($authTokenInfo->getImpersonatedUserId());
-                } catch(UserNotFoundException $ex) {
+                } catch(RuntimeException $ex) {
                     $userInfo = $userInfoReal;
                 }
             }
@@ -297,7 +295,7 @@ final class SharpChatRoutes {
                 try {
                     $userInfo = User::byUsername($userId);
                     $userId = $userInfo->getId();
-                } catch(UserNotFoundException $ex) {
+                } catch(RuntimeException $ex) {
                     $userId = 0;
                 }
 
@@ -359,13 +357,13 @@ final class SharpChatRoutes {
 
         try {
             $modInfo = User::byId((int)$modId);
-        } catch(UserNotFoundException $ex) {
+        } catch(RuntimeException $ex) {
             return 404;
         }
 
         try {
             $userInfo = User::byId((int)$userId);
-        } catch(UserNotFoundException $ex) {
+        } catch(RuntimeException $ex) {
             return 404;
         }
 
@@ -380,7 +378,7 @@ final class SharpChatRoutes {
                 $userAddr,
                 $modAddr
             );
-        } catch(UserWarningCreationFailedException $ex) {
+        } catch(RuntimeException $ex) {
             return 500;
         }
 
diff --git a/src/Users/Assets/UserAssetException.php b/src/Users/Assets/UserAssetException.php
deleted file mode 100644
index 2736f0e..0000000
--- a/src/Users/Assets/UserAssetException.php
+++ /dev/null
@@ -1,6 +0,0 @@
-<?php
-namespace Misuzu\Users\Assets;
-
-use Misuzu\Users\UsersException;
-
-class UserAssetException extends UsersException {}
diff --git a/src/Users/Assets/UserImageAsset.php b/src/Users/Assets/UserImageAsset.php
index bf5ccdf..54f213b 100644
--- a/src/Users/Assets/UserImageAsset.php
+++ b/src/Users/Assets/UserImageAsset.php
@@ -1,16 +1,10 @@
 <?php
 namespace Misuzu\Users\Assets;
 
+use InvalidArgumentException;
+use RuntimeException;
 use Misuzu\Users\User;
 
-class UserImageAssetFileCreationFailedException extends UserAssetException {}
-class UserImageAssetFileNotFoundException extends UserAssetException {}
-class UserImageAssetInvalidImageException extends UserAssetException {}
-class UserImageAssetInvalidTypeException extends UserAssetException {}
-class UserImageAssetInvalidDimensionsException extends UserAssetException {}
-class UserImageAssetFileTooLargeException extends UserAssetException {}
-class UserImageAssetMoveFailedException extends UserAssetException {}
-
 abstract class UserImageAsset implements UserImageAssetInterface {
     public const PUBLIC_STORAGE = '/msz-storage';
 
@@ -90,20 +84,20 @@ abstract class UserImageAsset implements UserImageAssetInterface {
 
     public function setFromPath(string $path): void {
         if(!is_file($path))
-            throw new UserImageAssetFileNotFoundException;
+            throw new InvalidArgumentException('$path not found.');
 
         $imageInfo = getimagesize($path);
         if($imageInfo === false || $imageInfo[0] < 1 || $imageInfo[1] < 1)
-            throw new UserImageAssetInvalidImageException;
+            throw new InvalidArgumentException('$path is not a valid image.');
 
         if(!self::isAllowedType($imageInfo[2]))
-            throw new UserImageAssetInvalidTypeException;
+            throw new InvalidArgumentException('$path is not an allowed image file.');
 
         if($imageInfo[0] > $this->getMaxWidth() || $imageInfo[1] > $this->getMaxHeight())
-            throw new UserImageAssetInvalidDimensionsException;
+            throw new InvalidArgumentException('Dimensions of $path are too large.');
 
         if(filesize($path) > $this->getMaxBytes())
-            throw new UserImageAssetFileTooLargeException;
+            throw new InvalidArgumentException('File size of $path is too large.');
 
         $this->delete();
 
@@ -113,13 +107,13 @@ abstract class UserImageAsset implements UserImageAssetInterface {
             mkdir($targetDir, 0775, true);
 
         if(is_uploaded_file($path) ? !move_uploaded_file($path, $targetPath) : !copy($path, $targetPath))
-            throw new UserImageAssetMoveFailedException;
+            throw new RuntimeException('Was unable to move $path to the storage destination.');
     }
 
     public function setFromData(string $data): void {
         $file = tempnam(sys_get_temp_dir(), 'msz');
         if($file === false || !is_file($file))
-            throw new UserImageAssetFileCreationFailedException;
+            throw new RuntimeException('Failed to apply user asset data.');
         chmod($file, 0664);
         file_put_contents($file, $data);
         self::setFromPath($file);
diff --git a/src/Users/User.php b/src/Users/User.php
index 50faf9a..34be691 100644
--- a/src/Users/User.php
+++ b/src/Users/User.php
@@ -3,6 +3,8 @@ namespace Misuzu\Users;
 
 use DateTime;
 use DateTimeZone;
+use InvalidArgumentException;
+use RuntimeException;
 use Index\XString;
 use Index\Colour\Colour;
 use Misuzu\DateCheck;
@@ -15,10 +17,6 @@ use Misuzu\Parsers\Parser;
 use Misuzu\Users\Assets\UserAvatarAsset;
 use Misuzu\Users\Assets\UserBackgroundAsset;
 
-class UserException extends UsersException {} // this naming definitely won't lead to confusion down the line!
-class UserNotFoundException extends UserException {}
-class UserCreationFailedException extends UserException {}
-
 // Quick note to myself and others about the `display_role` column in the users database and its corresponding methods in this class.
 // Never ever EVER use it for ANYTHING other than determining display colours, there's a small chance that it might not be accurate.
 // And even if it were, roles properties are aggregated and thus must all be accounted for.
@@ -704,7 +702,7 @@ class User implements HasRankInterface {
             ->executeGetId();
 
         if($createUser < 1)
-            throw new UserCreationFailedException;
+            throw new RuntimeException('User creation failed.');
 
         return self::byId($createUser);
     }
@@ -744,13 +742,13 @@ class User implements HasRankInterface {
                 ->bind('user_id', $userId)
                 ->fetchObject(self::class);
             if(!$user)
-                throw new UserNotFoundException;
+                throw new RuntimeException('Failed to fetch user by ID.');
             return $user;
         });
     }
     public static function byUsername(string $username): ?self {
         if(empty($username))
-            throw new UserNotFoundException;
+            throw new InvalidArgumentException('$username may not be empty.');
 
         $username = mb_strtolower($username);
 
@@ -764,13 +762,13 @@ class User implements HasRankInterface {
                 ->bind('username', $username)
                 ->fetchObject(self::class);
             if(!$user)
-                throw new UserNotFoundException;
+                throw new RuntimeException('Failed to find user by ID.');
             return $user;
         });
     }
     public static function byEMailAddress(string $address): ?self {
         if(empty($address))
-            throw new UserNotFoundException;
+            throw new InvalidArgumentException('$address may not be empty.');
 
         $address = mb_strtolower($address);
 
@@ -781,13 +779,13 @@ class User implements HasRankInterface {
                 ->bind('email', $address)
                 ->fetchObject(self::class);
             if(!$user)
-                throw new UserNotFoundException;
+                throw new RuntimeException('Failed to find user by e-mail address.');
             return $user;
         });
     }
     public static function byUsernameOrEMailAddress(string $usernameOrAddress): self {
         if(empty($usernameOrAddress))
-            throw new UserNotFoundException;
+            throw new InvalidArgumentException('$usernameOrAddress may not be empty.');
 
         $usernameOrAddressLower = mb_strtolower($usernameOrAddress);
 
@@ -803,7 +801,7 @@ class User implements HasRankInterface {
                 ->bind('username', $usernameOrAddressLower)
                 ->fetchObject(self::class);
             if(!$user)
-                throw new UserNotFoundException;
+                throw new RuntimeException('Failed to find user by name or e-mail address.');
             return $user;
         });
     }
@@ -813,7 +811,7 @@ class User implements HasRankInterface {
     }
     public static function findForProfile($userIdOrName): ?self {
         if(empty($userIdOrName))
-            throw new UserNotFoundException;
+            throw new InvalidArgumentException('$userIdOrName may not be empty.');
 
         $userIdOrNameLower = mb_strtolower($userIdOrName);
 
@@ -828,7 +826,7 @@ class User implements HasRankInterface {
                 ->bind('username', (string)$userIdOrName)
                 ->fetchObject(self::class);
             if(!$user)
-                throw new UserNotFoundException;
+                throw new RuntimeException('Failed to find user by ID or name.');
             return $user;
         });
     }
diff --git a/src/Users/UserAuthSession.php b/src/Users/UserAuthSession.php
index 9f984e4..cf0aeb0 100644
--- a/src/Users/UserAuthSession.php
+++ b/src/Users/UserAuthSession.php
@@ -1,12 +1,9 @@
 <?php
 namespace Misuzu\Users;
 
+use RuntimeException;
 use Misuzu\DB;
 
-class UserAuthSessionException extends UsersException {}
-class UserAuthSessionNotFoundException extends UserAuthSessionException {}
-class UserAuthSessionCreationFailedException extends UserAuthSessionException {}
-
 class UserAuthSession {
     // Database fields
     private $user_id = -1;
@@ -64,17 +61,13 @@ class UserAuthSession {
             ->execute();
 
         if(!$created)
-            throw new UserAuthSessionCreationFailedException;
+            throw new RuntimeException('Failed to create auth session.');
         if(!$return)
             return null;
 
-        try {
-            $object = self::byToken($token);
-            $object->user = $user;
-            return $object;
-        } catch(UserAuthSessionNotFoundException $ex) {
-            throw new UserAuthSessionCreationFailedException;
-        }
+        $object = self::byToken($token);
+        $object->user = $user;
+        return $object;
     }
 
     private static function byQueryBase(): string {
@@ -86,7 +79,7 @@ class UserAuthSession {
             ->fetchObject(self::class);
 
         if(!$object)
-            throw new UserAuthSessionNotFoundException;
+            throw new RuntimeException('Could not find auth session token.');
 
         return $object;
     }
diff --git a/src/Users/UserLoginAttempt.php b/src/Users/UserLoginAttempt.php
index ba55399..893a4c6 100644
--- a/src/Users/UserLoginAttempt.php
+++ b/src/Users/UserLoginAttempt.php
@@ -1,6 +1,7 @@
 <?php
 namespace Misuzu\Users;
 
+use RuntimeException;
 use Misuzu\ClientInfo;
 use Misuzu\DB;
 use Misuzu\Pagination;
@@ -32,7 +33,7 @@ class UserLoginAttempt {
             $this->userLookedUp = true;
             try {
                 $this->user = User::byId($userId);
-            } catch(UserNotFoundException $ex) {}
+            } catch(RuntimeException $ex) {}
         }
         return $this->user;
     }
diff --git a/src/Users/UserRecoveryToken.php b/src/Users/UserRecoveryToken.php
index 29458ac..2af245a 100644
--- a/src/Users/UserRecoveryToken.php
+++ b/src/Users/UserRecoveryToken.php
@@ -1,12 +1,9 @@
 <?php
 namespace Misuzu\Users;
 
+use RuntimeException;
 use Misuzu\DB;
 
-class UserRecoveryTokenException extends UsersException {}
-class UserRecoveryTokenNotFoundException extends UserRecoveryTokenException {}
-class UserRecoveryTokenCreationFailedException extends UserRecoveryTokenException {}
-
 class UserRecoveryToken {
     // Database fields
     private $user_id = -1;
@@ -82,17 +79,13 @@ class UserRecoveryToken {
             ->execute();
 
         if(!$created)
-            throw new UserRecoveryTokenCreationFailedException;
+            throw new RuntimeException('Failed to create password recovery token.');
         if(!$return)
             return null;
 
-        try {
-            $object = self::byToken($token);
-            $object->user = $user;
-            return $object;
-        } catch(UserRecoveryTokenNotFoundException $ex) {
-            throw new UserRecoveryTokenCreationFailedException;
-        }
+        $object = self::byToken($token);
+        $object->user = $user;
+        return $object;
     }
 
     private static function byQueryBase(): string {
@@ -104,7 +97,7 @@ class UserRecoveryToken {
             ->fetchObject(self::class);
 
         if(!$object)
-            throw new UserRecoveryTokenNotFoundException;
+            throw new RuntimeException('Failed to fetch recovery token.');
 
         return $object;
     }
@@ -115,7 +108,7 @@ class UserRecoveryToken {
             ->fetchObject(self::class);
 
         if(!$object)
-            throw new UserRecoveryTokenNotFoundException;
+            throw new RuntimeException('Failed to fetch recovery token by user and address.');
 
         return $object;
     }
diff --git a/src/Users/UserRole.php b/src/Users/UserRole.php
index 2655888..f1bcdc9 100644
--- a/src/Users/UserRole.php
+++ b/src/Users/UserRole.php
@@ -2,16 +2,13 @@
 namespace Misuzu\Users;
 
 use ArrayAccess;
+use RuntimeException;
 use Index\Colour\Colour;
 use Misuzu\DB;
 use Misuzu\HasRankInterface;
 use Misuzu\Memoizer;
 use Misuzu\Pagination;
 
-class UserRoleException extends UsersException {}
-class UserRoleNotFoundException extends UserRoleException {}
-class UserRoleCreationFailedException extends UserRoleException {}
-
 class UserRole implements ArrayAccess, HasRankInterface {
     public const DEFAULT = 1;
 
@@ -184,7 +181,7 @@ class UserRole implements ArrayAccess, HasRankInterface {
             )   ->bind('role', $roleId)
                 ->fetchObject(self::class);
             if(!$object)
-                throw new UserRoleNotFoundException;
+                throw new RuntimeException('No role found with that ID.');
             return $object;
         });
     }
diff --git a/src/Users/UserSession.php b/src/Users/UserSession.php
index 7a83063..2aae321 100644
--- a/src/Users/UserSession.php
+++ b/src/Users/UserSession.php
@@ -1,14 +1,11 @@
 <?php
 namespace Misuzu\Users;
 
+use RuntimeException;
 use Misuzu\ClientInfo;
 use Misuzu\DB;
 use Misuzu\Pagination;
 
-class UserSessionException extends UsersException {}
-class UserSessionCreationFailedException extends UserSessionException {}
-class UserSessionNotFoundException extends UserSessionException {}
-
 class UserSession {
     public const TOKEN_SIZE = 64;
     public const LIFETIME = 60 * 60 * 24 * 31;
@@ -196,7 +193,7 @@ class UserSession {
             ->executeGetId();
 
         if($sessionId < 1)
-            throw new UserSessionCreationFailedException;
+            throw new RuntimeException('Failed to create new session.');
 
         return self::byId($sessionId);
     }
@@ -223,7 +220,7 @@ class UserSession {
             ->fetchObject(self::class);
 
         if(!$session)
-            throw new UserSessionNotFoundException;
+            throw new RuntimeException('Could not find a session with that ID.');
 
         return $session;
     }
@@ -233,7 +230,7 @@ class UserSession {
             ->fetchObject(self::class);
 
         if(!$session)
-            throw new UserSessionNotFoundException;
+            throw new RuntimeException('Could not find a session with that token.');
 
         return $session;
     }
diff --git a/src/Users/UserWarning.php b/src/Users/UserWarning.php
index a78c76b..5dd4167 100644
--- a/src/Users/UserWarning.php
+++ b/src/Users/UserWarning.php
@@ -2,13 +2,10 @@
 namespace Misuzu\Users;
 
 use InvalidArgumentException;
+use RuntimeException;
 use Misuzu\DB;
 use Misuzu\Pagination;
 
-class UserWarningException extends UsersException {}
-class UserWarningNotFoundException extends UserWarningException {}
-class UserWarningCreationFailedException extends UserWarningException {}
-
 class UserWarning {
     // Informational notes on profile, only show up for moderators
     public const TYPE_NOTE = 0;
@@ -202,7 +199,7 @@ class UserWarning {
             ->executeGetId();
 
         if($warningId < 1)
-            throw new UserWarningCreationFailedException;
+            throw new RuntimeException('Failed to create new warning.');
 
         return self::byId($warningId);
     }
@@ -234,7 +231,7 @@ class UserWarning {
         )   ->bind('warning', $warningId)
             ->fetchObject(self::class);
         if(!$object)
-            throw new UserWarningNotFoundException;
+            throw new RuntimeException('Not warning with that ID could be found.');
         return $object;
     }
     public static function byUserActive(User $user): ?self {
diff --git a/src/Users/UsersException.php b/src/Users/UsersException.php
deleted file mode 100644
index 575038f..0000000
--- a/src/Users/UsersException.php
+++ /dev/null
@@ -1,6 +0,0 @@
-<?php
-namespace Misuzu\Users;
-
-use RuntimeException;
-
-class UsersException extends RuntimeException {}