CreditHistory : createdBy et updatedBy nullable=true

ShopBundle/Model/CreditHistory.php

 use Lc\ShopBundle\Context\OrderRefundInterface;
 use Lc\ShopBundle\Context\PayoffInterface;
 use Lc\ShopBundle\Context\UserMerchantInterface;
+use Gedmo\Mapping\Annotation as Gedmo;
 
 /**
  * @ORM\MappedSuperclass()
          */
         protected $orderRefund;
 
+        /**
+         * @Gedmo\Blameable(on="create")
+         * @ORM\ManyToOne(targetEntity="Lc\ShopBundle\Context\UserInterface")
+         * @ORM\JoinColumn(nullable=true)
+         */
+        protected $createdBy;
+
+        /**
+         * @Gedmo\Blameable(on="update")
+         * @ORM\ManyToOne(targetEntity="Lc\ShopBundle\Context\UserInterface")
+         * @ORM\JoinColumn(nullable=true)
+         */
+        protected $updatedBy;
 
         public function getAmount(): ?float
         {