Fix: authorization helper won't send a list of center if an admin is authenticated

src/Bundle/ChillMainBundle/Security/Authorization/AuthorizationHelper.php

@@ -120,6 +120,11 @@ class AuthorizationHelper implements AuthorizationHelperInterface
         if ($role instanceof Role) {
             $role = $role->getRole();
         }
+
+        if (!$user instanceof User) {
+            return [];
+        }
+
         /** @var array<string, Center> $centers */
         $centers = [];