public async Task <IActionResult> GetMessage(int userId, int id)
        {
            // Authorization check
            if (userId != int.Parse(User.FindFirst(ClaimTypes.NameIdentifier).Value))
            {
                return(Unauthorized());
            }

            var messageFromRepo = await _repo.GetMessage(id);

            if (messageFromRepo == null)
            {
                return(NotFound());
            }

            return(Ok(messageFromRepo));
        }