public function getConfigurationFile( $serverName, $login){
        $service = sprintf( self::API_VPN_USER_CONFIG, $serverName, $login);
        $rest = $this->getService( $service);
        $rest->getConfig()->setIsReturnToJsonDecode( false);
        $rest->setIsResponseToCheck( false);
        $rest->GET();

        return $rest->getCurlResponse();
    }