public IActionResult Create(MonitorViewModel monitor)
        {
            if (ModelState.IsValid)
            {
                Monitor entitiyMonitor = new Monitor
                {
                    Id          = Guid.NewGuid(),
                    AppUserId   = UserId,
                    Url         = monitor.Url,
                    DisplayName = monitor.Name
                };

                _monitorService.Add(entitiyMonitor);
                _monitorService.Save();

                return(RedirectToAction(nameof(Index)));
            }
            ViewData["AppUserId"] = UserId;
            return(View(monitor));
        }