public ScoreHistory()
        {
            InitializeComponent();

            GameDbController db = new GameDbController();

            Collection <string> usernames = db.getAllUsernames();

            foreach (string s in usernames)
            {
                ListViewItem item = new ListViewItem();
                item.Text = s;
                item.Tag  = s;
                lstUsernames.Items.Add(item);
            }
        }