public async void OnSuccess(Java.Lang.Object result)
        {
            if (storageRef != null)
            {
                var url = await storageRef.GetDownloadUrlAsync();

                //Toast.MakeText(context, $"{r.ToString()}", ToastLength.Long).Show();
                if (url != null)
                {
                    await query.UpdateAsync("ImageUrl", url.ToString());
                }
            }
        }