suportDoctrine.php

 <?php
class UserSubscriber
{ 
   public function postPersist(LifecycleEventArgs $args)
   {
           $entity = $args->getObject();

           // if this listener only applies to certain entity types,
           // add some code to check the entity type as early as possible
           if (!$this->supports($entity)) {
               return;
           }

           $entityManager = $args->getObjectManager();
           // ... do something with the User entity
   }

   public function supports($entity): bool
   {
       return $entity instanceof User;
   }
}