add authentication

src/Repository/ProductRepository.php

@@ -3,6 +3,7 @@
 namespace App\Repository;
 
 use App\Entity\Product;
+use DateTime;
 use Doctrine\Bundle\DoctrineBundle\Repository\ServiceEntityRepository;
 use Doctrine\Persistence\ManagerRegistry;
 
@@ -24,7 +25,7 @@ class ProductRepository extends ServiceEntityRepository
     public function save(Product $entity, bool $flush = false): ?int
     {
 
-        $entity->setUpdateTime(new \DateTime());
+        $entity->setUpdateTime(new DateTime());
 
         $this->getEntityManager()->persist($entity);
 
@@ -68,4 +69,4 @@ class ProductRepository extends ServiceEntityRepository
 //            ->getOneOrNullResult()
 //        ;
 //    }
-}
+}