public async Task <ActionResult> Post([FromBody] NotificationModelApi <int> notification, [FromRoute] int Id)
        {
            string retMessage = string.Empty;

            try
            {
                await _hubContext.SendNotificationToSubscriber(notification, Id);

                retMessage = "Success";
            }
            catch (Exception e)
            {
                retMessage = e.ToString();
            }
            return(Ok(retMessage));
        }