Fix: Avoid null pointer exception

src/EventListener/LogoutListener.php

@@ -13,6 +13,10 @@ class LogoutListener
 
     public function onLogout(LogoutEvent $event): void
     {
+        if (null === $event->getToken()) {
+            return;
+        }
+
         $this->authenticationLogger->info('Logout', [
             'user' => $event->getToken()->getUserIdentifier(),
         ]);