public int getID() {
        try {
            String url = "jdbc:mysql://74.220.219.118:3306/kkmonlee_rubicon";
            Class.forName("com.mysql.jdbc.Driver");
            Connection conn = DriverManager.getConnection(url, "kkmonlee_insert", "seatspace");
            Statement statement = conn.createStatement();
            ResultSet rs = statement.executeQuery("SELECT MAX(UserID) from Volunteers");
            if (rs.next()) {
                return rs.getInt(1);
            }
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return 0;
    }