public static function settingsSend($settings, $settings_url, &$debug_log=false) {

        $key_key = self::ltiParameter('key_key');
        $secret = self::decrypt_secret(self::ltiParameter('secret'));

        $retval = LTI::sendJSONSettings($settings, $settings_url, $key_key, $secret, $debug_log);
        return $retval;
    }