Merge branch 'dev'

backend/controllers/UserController.php

         {
                 $model = new User();
 
-                $userExist = User::searchOne([
-                        'email' => Yii::$app->request->post('email')
-                ]);
+                $userExist = false ;
+                $posts = Yii::$app->request->post() ;
+
+                if($posts) {
+                        $userExist = User::searchOne([
+                                'email' => $posts['User']['email']
+                        ]);
+                }
 
                 if ($userExist) {
                         Producer::addUser($userExist->id, GlobalParam::getCurrentProducerId()) ;