diff --git a/Presence.Api/Controllers/GroupController.cs b/Presence.Api/Controllers/GroupController.cs
index b748f37..b2c51f8 100644
--- a/Presence.Api/Controllers/GroupController.cs
+++ b/Presence.Api/Controllers/GroupController.cs
@@ -1,4 +1,5 @@
-using domain.Service;
+using domain.Request;
+using domain.Service;
 using domain.UseCase;
 using Microsoft.AspNetCore.Mvc;
 using Presence.Api.Response;
@@ -33,5 +34,12 @@ namespace Presence.Api.Controllers
             return Ok(result);
 
         }
+
+        [HttpPost("/admin/{groupId}/students")]
+        public void AddGroup(int groupId, [FromBody] AddGroupRequest addGroupRequest)
+        {
+            Console.WriteLine(groupId);
+            _groupService.AddGroup(addGroupRequest);
+        }
     }
 }
diff --git a/Presence.Desktop/ViewModels/GroupViewModel.cs b/Presence.Desktop/ViewModels/GroupViewModel.cs
index 99131e5..5a49629 100644
--- a/Presence.Desktop/ViewModels/GroupViewModel.cs
+++ b/Presence.Desktop/ViewModels/GroupViewModel.cs
@@ -25,47 +25,55 @@ namespace Presence.Desktop.ViewModels
         private GroupPresenter? _selectedGroupItem;
 
 
-
+        private IGroupUseCase _groupUseCase;
         public ObservableCollection<UserPresenter> Users { get => _users;}
         public ObservableCollection<UserPresenter> _users;
         public GroupViewModel(IGroupUseCase groupUseCase)
         {
-            foreach (var item in groupUseCase.GetGroupsWithStudents())
-            {
-                GroupPresenter groupPresenter = new GroupPresenter
-                {
-                    Id = item.Id,
-                    Name = item.Name,
-                    users = item.Users?.Select(user => new UserPresenter
-                    {
-                        Name = user.Name,
-                        Guid = user.Guid,
-                        Group = new GroupPresenter { Id = item.Id, Name = item.Name }
-                    }
-                    ).ToList()
-                };
-                _groupPresentersDataSource.Add(groupPresenter);
-            }
-            _groups = new ObservableCollection<GroupPresenter>(_groupPresentersDataSource);
-            
+            _groupUseCase = groupUseCase;
             _users = new ObservableCollection<UserPresenter>();
-
+            RefreshGroups();
             this.WhenAnyValue(vm => vm.SelectedGroupItem)
-                .Subscribe(_ => SetUsers());
+                .Subscribe(_ =>
+                {   RefreshGroups();
+                    SetUsers();
+                });
 
         }
 
         private void SetUsers()
         {
             if(SelectedGroupItem == null) return;
-            if (SelectedGroupItem.users == null) return;
             Users.Clear();
-            foreach (var item in SelectedGroupItem.users)
+            var group = _groups.First(it => it.Id == SelectedGroupItem.Id);
+            if(group.users == null) return;
+            foreach (var item in group.users)
             {
                 Users.Add(item);
             }
         }
 
+        private void RefreshGroups()
+        {
+            _groupPresentersDataSource.Clear();
+            foreach (var item in _groupUseCase.GetGroupsWithStudents())
+            {
+                GroupPresenter groupPresenter = new GroupPresenter
+                {
+                    Id = item.Id,
+                    Name = item.Name,
+                    users = item.Users?.Select(user => new UserPresenter
+                        {
+                            Name = user.Name,
+                            Guid = user.Guid,
+                            Group = new GroupPresenter { Id = item.Id, Name = item.Name }
+                        }
+                    ).ToList()
+                };
+                _groupPresentersDataSource.Add(groupPresenter);
+            }
+            _groups = new ObservableCollection<GroupPresenter>(_groupPresentersDataSource);
+        }
         public string? UrlPathSegment { get; }
         public IScreen HostScreen { get; }
     }
diff --git a/Presence.Desktop/Views/MainWindow.axaml b/Presence.Desktop/Views/MainWindow.axaml
index 25f9e3a..58f7aa1 100644
--- a/Presence.Desktop/Views/MainWindow.axaml
+++ b/Presence.Desktop/Views/MainWindow.axaml
@@ -1,4 +1,4 @@
-<Window xmlns="https://github.com/avaloniaui"
+ <Window xmlns="https://github.com/avaloniaui"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
         xmlns:app="clr-namespace:Presence.Desktop"