private static function buildToken(): string
    {
        return \md5(
            \sprintf(
                'MF_SESSION_INTEGRITY_TOKEN:%s%s%s%s%s%s',
                static::getLooseIP(),
                static::getHttpUserAgent(),
                static::getHttpAccept(),
                static::getHttpAcceptEncoding(),
                static::getHttpAcceptLanguage(),
                static::getHttpAcceptCharset()
            )
        );
    }