[EDIT] fixed some user stuff

Server/Models/ServerCommunication.cs

@@ -18,6 +18,7 @@ namespace Server.Models
         public List<Lobby> lobbies;
         private Dictionary<Lobby, List<ServerClient>> serverClientsInlobbies;
         public Action newClientAction;
+        
 
         /// <summary>
         /// use a padlock object to make sure the singleton is thread-safe
@@ -132,7 +133,8 @@ namespace Server.Models
                     {
                         foreach(ServerClient sc in serverClients)
                         {
-                            if (sc.Username == username)
+                            
+                            if (sc.Username == user.Username)
                             {
                                 serverClientsInlobbies[l].Add(sc);
                                 break;

SharedClientServer/Lobby.cs

@@ -41,7 +41,7 @@ namespace Client
             succes = false;
             if (_users.Count < _maxPlayers)
             {
-                _users.Add(new User(username, 0));
+                _users.Add(new User(username, 0,false));
                 succes = true;
             }
         }