private void displayUsersConnected(Users users, NetworkStream stream)
        {
            users.UserNameStartup();

            lock (lockDict)
            {
                if (!connectedUsers.ContainsKey(users.UserId))
                {
                    connectedUsers.Add(client.UserId, client);
                    showOnConsoleUsers(client);
                    Thread startUser = new Thread(() => client.ReceiveUsers(connectedUsers));
                    startUser.Start();
                }
            }
        }