public async Task <ActionResult> AddCommentAsync([FromRoute] string articleId, [FromBody] Comment comment)
        {
            if (articleId is null)
            {
                return(BadRequest(articleId));
            }

            if (!ModelState.IsValid)
            {
                return(BadRequest(ModelState));
            }

            comment.CreatedUser = User.Identity.Name;
            await _articleService.AddCommentAsync(articleId, comment);

            return(Ok(comment));
        }