null reference fix

src/LocalData/AbstractLocalDataPostEventSubscriber.php

@@ -4,7 +4,9 @@ declare(strict_types=1);
 
 namespace Dbp\Relay\CoreBundle\LocalData;
 
+use Dbp\Relay\CoreBundle\API\UserSessionInterface;
 use Dbp\Relay\CoreBundle\Authorization\AbstractAuthorizationService;
+use Dbp\Relay\CoreBundle\Authorization\AuthorizationDataProviderProvider;
 use Symfony\Component\Config\Definition\Builder\TreeBuilder;
 use Symfony\Component\EventDispatcher\EventSubscriberInterface;
 
@@ -18,6 +20,13 @@ abstract class AbstractLocalDataPostEventSubscriber extends AbstractAuthorizatio
     /** @var string[] */
     private $attributeMapping;
 
+    public function __construct(UserSessionInterface $userSession, AuthorizationDataProviderProvider $authorizationDataProviderProvider)
+    {
+        parent::__construct($userSession, $authorizationDataProviderProvider);
+
+        $this->attributeMapping = [];
+    }
+
     public function setConfig(array $config)
     {
         $configNode = $config[self::CONFIG_NODE] ?? [];