protected override async void OnViewLoadedAsyncExecute()
        {
            IsBusy = true;
            var users = await _userRegistrationService.GetLookUpsAsync();

            SetDataSource(metroComboBox1, users);
            treeView1 = await _permissionsManger.OnLoadMenuItems(treeView1);

            metroComboBox1.SelectedIndex = -1;
            IsBusy = false;
        }