public async Task <IEnumerable <Comment> > GetCommentsByNamePhotoAsync(string username, string photoName)
        {
            var reply = await _client.GetCommentsByPhotoNameAsync(
                new GetCommentsByPhotoNameRequest { Username = username, PhotoName = photoName }
                );

            return(_mapper.Map <IEnumerable <Comment> >(reply.CommentList));
        }