fix #1985

Author: DeinFreund

ZkLobbyServer/ConnectedUser.cs

@@ -630,14 +630,14 @@ public async Task RemoveConnection(ClientConnection con, string reason)
                 if (server.ConnectedUsers.TryRemove(Name, out connectedUser))
                 {
                     connectedUser.ResetHasSeen();
-                    connectedUser.User.AccountID = 0;
 
                     using (var db = new ZkDataContext())
                     {
                         var acc = await db.Accounts.FindAsync(User.AccountID);
                         acc.LastLogout = DateTime.UtcNow;
                         await db.SaveChangesAsync();
                     }
+                    connectedUser.User.AccountID = 0;
                 }
             }
         }