public function buildUrlParams($refreshToken)
    {
        $params = 'client_id=' . $this->helper->getWebsiteConfig(
            \Dotdigitalgroup\Email\Helper\Config::XML_PATH_CONNECTOR_CLIENT_ID
        )
            . '&client_secret=' . $this->helper->getWebsiteConfig(
                \Dotdigitalgroup\Email\Helper\Config::XML_PATH_CONNECTOR_CLIENT_SECRET_ID
            )
            . '&refresh_token=' . $refreshToken . '&grant_type=refresh_token';

        return $params;
    }