public async Task <ActionResult> PostMeme([FromBody] MemeDto memeDto)
        {
            try
            {
                memeDto.CerationDate = DateTime.Now;
                var meme = _mapper.Map <Meme>(memeDto);
                await _memeService.CreateMemeAsync(meme);

                return(Ok());
            }
            catch (AppException ex)
            {
                // return error message if there was an exception
                return(BadRequest(new { message = ex.Message }));
            }
        }