docs: add cascade on delete (#482)

When a user will be deleted, then the tokens should be deleted too. Otherwise it is not possible to remove a user, when a token exists.

Author: iCodr8

Resources/doc/index.md

@@ -158,6 +158,7 @@ class AccessToken extends BaseAccessToken
 
     /**
      * @ORM\ManyToOne(targetEntity="Your\Own\Entity\User")
+     * @ORM\JoinColumn(name="user_id", referencedColumnName="id", onDelete="CASCADE")
      */
     protected $user;
 }
@@ -192,6 +193,7 @@ class RefreshToken extends BaseRefreshToken
 
     /**
      * @ORM\ManyToOne(targetEntity="Your\Own\Entity\User")
+     * @ORM\JoinColumn(name="user_id", referencedColumnName="id", onDelete="CASCADE")
      */
     protected $user;
 }
@@ -226,6 +228,7 @@ class AuthCode extends BaseAuthCode
 
     /**
      * @ORM\ManyToOne(targetEntity="Your\Own\Entity\User")
+     * @ORM\JoinColumn(name="user_id", referencedColumnName="id", onDelete="CASCADE")
      */
     protected $user;
 }