public async Task<IHttpActionResult> PutChatMessage(long id, ChatMessage chatMessage)
        {
            if (!ModelState.IsValid)
            {
                return BadRequest(ModelState);
            }

            if (id != chatMessage.Id)
            {
                return BadRequest();
            }

            await unitOfWork.ChatMessageRepository.Update(chatMessage);

            try
            {
                unitOfWork.Commit();
            }
            catch (DbUpdateConcurrencyException)
            {
                if (!ChatMessageExists(id))
                {
                    return NotFound();
                }
                else
                {
                    throw;
                }
            }

            return StatusCode(HttpStatusCode.NoContent);
        }
        public async Task<IHttpActionResult> PostChatMessage(ChatMessage chatMessage)
        {
            if (!ModelState.IsValid)
            {
                return BadRequest(ModelState);
            }

            await unitOfWork.ChatMessageRepository.Add(chatMessage);
            unitOfWork.Commit();

            return CreatedAtRoute("DefaultApi", new { id = chatMessage.Id }, chatMessage);
        }