Fix DI

src/ForumAccess/Access.php

@@ -3,6 +3,7 @@
 namespace Drupal\forum_access\ForumAccess;
 
 use Drupal\Core\Access\AccessResult;
+use Drupal\Core\DependencyInjection\ContainerInjectionInterface;
 use Drupal\Core\Entity\EntityInterface;
 use Drupal\Core\Extension\ModuleHandlerInterface;
 use Drupal\Core\Session\AccountInterface;
@@ -12,7 +13,7 @@ use Symfony\Component\DependencyInjection\ContainerInterface;
 /**
  * Access checks for forum.
  */
-class Access {
+class Access implements ContainerInjectionInterface {
 
   /**
    * {@inheritdoc}