private async void LvRepos_Refreshing(object sender, EventArgs e)
        {
            ReposService service = new ReposService();

            ListRepos = await service.GetRepos(user.login);

            lvRepos.ItemsSource             = null;
            lvRepos.ItemsSource             = ListRepos;
            ((ListView)sender).IsRefreshing = false;
        }
        protected async override void OnAppearing()
        {
            base.OnAppearing();
            ReposService service = new ReposService();

            lvRepos.IsRefreshing = true;
            ListRepos            = await service.GetRepos(user.login);

            lvRepos.ItemsSource  = ListRepos;
            lvRepos.IsRefreshing = false;
        }