public function assignToApplication($userName)
 {
     $restApi = new RestAPI();
     $sendData = array("account_id" => self::ID, "api_key" => self::API_KEY, "user_name" => $userName, "application_name" => "staging-bottel");
     $apiResult = $restApi->CallAPIGuzzle("GET", "https://api.voximplant.com/platform_api/BindUser/", $sendData);
     $result = json_decode($apiResult);
     if ($result->{"result"} == 1) {
         return true;
     } else {
         return false;
     }
 }