Update IdentityInterface.php

framework/web/IdentityInterface.php

@@ -21,6 +21,11 @@ namespace yii\web;
  *         return static::findOne($id);
  *     }
  *
+ *     public static function findIdentityByAccessToken($token)
+ *     {
+ *         return static::findOne(['access_token' => $token]);
+ *     }
+ *
  *     public function getId()
  *     {
  *         return $this->id;