public async Task <FileResult> GetUserPicture(int?id)
        {
            if (id == null)
            {
                return(File("/images/UserImage.png", "image/png"));
            }

            var picture = await pictureService.GetPictureAsync(id.GetValueOrDefault());

            if (picture == null || picture.Data.Length == 0)
            {
                return(File("/images/UserImage.png", "image/png"));
            }

            return(File(picture.Data, "image/jpg"));
        }