Use LogoutEvent listener instead of deprecated LogoutHandler.

config/packages/security.yaml

@@ -16,7 +16,8 @@ security:
             pattern: ^/(_(profiler|wdt)|css|images|js)/
             security: false
         main:
-            anonymous: lazy
+            anonymous: true
+            lazy: true
             user_checker: App\Security\UserChecker
 
             two_factor:
@@ -40,7 +41,6 @@ security:
             logout:
                 path: logout
                 target: homepage
-                handlers: [App\EventSubscriber\LogSystem\LogoutLoggerHandler]
 
             remember_me:
                 secret:   '%kernel.secret%'

config/services.yaml

@@ -78,6 +78,12 @@ services:
             $allow_attachments_downloads: '%partdb.attachments.allow_downloads%'
             $mimeTypes: '@mime_types'
 
+    App\EventSubscriber\LogSystem\LogoutLoggerListener:
+        tags:
+            - name: 'kernel.event_listener'
+              event: 'Symfony\Component\Security\Http\Event\LogoutEvent'
+              dispatcher: security.event_dispatcher.main
+
     ####################################################################################################################
     # Attachment system
     ####################################################################################################################

src/EventSubscriber/LogSystem/LogoutLoggerListener.php

@@ -48,12 +48,13 @@ use App\Services\LogSystem\EventLogger;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\Security\Core\Authentication\Token\TokenInterface;
+use Symfony\Component\Security\Http\Event\LogoutEvent;
 use Symfony\Component\Security\Http\Logout\LogoutHandlerInterface;
 
 /**
  * This handler logs to event log, if a user logs out.
  */
-class LogoutLoggerHandler implements LogoutHandlerInterface
+class LogoutLoggerListener
 {
     protected $logger;
     protected $gpdr_compliance;
@@ -64,8 +65,16 @@ class LogoutLoggerHandler implements LogoutHandlerInterface
         $this->gpdr_compliance = $gpdr_compliance;
     }
 
-    public function logout(Request $request, Response $response, TokenInterface $token): void
+
+    public function __invoke(LogoutEvent $event)
     {
+        $request = $event->getRequest();
+        $token = $event->getToken();
+
+        if ($token === null) {
+            return;
+        }
+
         $log = new UserLogoutLogEntry($request->getClientIp(), $this->gpdr_compliance);
         $user = $token->getUser();
         if ($user instanceof User) {