DateTime d1;
        try
        {
            string sql = $"select subscribe from dle_users where email = '{textBoxUserEmail.Text}' and password = '{sspass}' ";
            MySqlCommand command = new MySqlCommand(sql, conn);
            string date = command.ExecuteScalar().ToString();

            var client = new TcpClient("time.nist.gov", 13);
            using (var streamReader = new StreamReader(client.GetStream()))
            {
                var response = streamReader.ReadToEnd();
                var utcDateTimeString = response.Substring(7, 17);
                d1 = DateTime.ParseExact(utcDateTimeString, "yy-MM-dd HH:mm:ss", CultureInfo.InvariantCulture, DateTimeStyles.AssumeUniversal);
            }

            DateTime d2 = Convert.ToDateTime(date);
            TimeSpan time = d2 - d1;

            int days = time.Days;

            if (days > 0)
            {
                passlIsPass = true;
                if (conn != null && conn.State != ConnectionState.Closed)
                    conn.Close();
            }
            if (days < 0)
            {
                DialogResult result = MessageBox.Show("Продлите подписку !", "Внимание", MessageBoxButtons.OK, MessageBoxIcon.Warning);
            }
        }

        catch (Exception ex)
        {
            passlIsPass = false;
            DialogResult result = MessageBox.Show("Логин или пароль введен неверно", "Внимание", MessageBoxButtons.OK, MessageBoxIcon.Warning);

        }