public void GenerateTimeStamp_ValidTimeStamp(HttpUtils sut)
        {
            var currentTime = DateTime.UtcNow - new DateTime(1970, 1, 1);

            var timestamp = sut.GenerateTimeStamp();

            var value = long.Parse(timestamp);
            value.Should().BeInRange(Convert.ToInt64(currentTime.TotalSeconds), Convert.ToInt64(currentTime.TotalSeconds) + 1);
        }