public async Task <IActionResult> File(int?id)
        {
            if (id == null)
            {
                return(NotFound());
            }
            var photo = await _context.Photos
                        .FirstOrDefaultAsync(m => m.PhotoID == id);

            if (photo == null)
            {
                return(NotFound());
            }
            var result = StorageRepository.DownloadBlob("photos", photo.PhotoID.ToString());

            return(File(result.Blob, result.ContentType));
        }