private async void TapClearCart_Tapped(object sender, EventArgs e)
        {
            var userId   = Preferences.Get("user_id", 0);
            var response = await APIService.ClearShoppingCart(userId);

            if (response)
            {
                LvShoppingCart.ItemsSource = null;
                LblTotalPrice.Text         = "0";
                await DisplayAlert("", "Your cart has been cleared", "OK");
            }
            else
            {
                await DisplayAlert("Oops", "Something went wrong", "Cancel");
            }
        }