public IActionResult GetAttachmet([FromRoute] int topicId, [FromRoute] int attachmentId)
        {
            if (!_topicPermissions.IsAssociatedTo(User.Identity.GetUserIdentity(), topicId))
            {
                return(Forbidden());
            }

            try
            {
                var    attachment = _attachmentsManager.GetAttachmentById(attachmentId);
                string fileName   = Path.Combine(Constants.AttachmentFolder, topicId.ToString(), attachment.Path);
                var    hash       = DownloadManager.AddFile(fileName, HttpContext.Connection.RemoteIpAddress);
                return(Ok(new StringWrapper()
                {
                    Value = hash
                }));
            }
            catch (InvalidOperationException)
            {
                return(NotFound());
            }
        }