public async Task Create_Stopwatch()
        {
            if (string.IsNullOrEmpty(UserName.Text) && string.IsNullOrEmpty(StopwatchName.Text))
            {
                await DisplayAlert("error", "supply user name and stopwatch name", "ok");

                return;
            }

            UserDetails = new UserStopwatchDetails(JsonData());
        }
        private async Task View_Stopwatch()
        {
            try
            {
                if (string.IsNullOrEmpty(UserName.Text))
                {
                    await DisplayAlert("error", "supply userName", "ok");

                    return;
                }

                UserDetails = new UserStopwatchDetails(JsonData());

                await Navigation.PushModalAsync(new StopwatchView(UserDetails.UserDetails));
            }
            catch (System.Exception)
            {
                await DisplayAlert("error", "unknown error, try again later", "ok");
            }
        }