public async Task <IActionResult> Post([FromBody] CommentDto commentDto, CancellationToken ct)
{
var comment = _mapper.Map <Comment>(commentDto);
_context.Comments.Add(comment);
await _context.SaveChangesAsync(ct).ConfigureAwait(false);
await _context.IncrementReplyCountAsync(commentDto.ReplyToId.GetValueOrDefault(), ct);
return(CreatedAtAction("GetComment", new { id = comment.Id }, _mapper.Map <CommentDto>(comment)));
}