public static void disconnect(Player p) throws IOException {
        Socket s = p.getPlayerSocket();
        if (!onlinePlayers.contains(p.getPlayerName()) && Player.getPlayerName() == null) {
            s.close();
            p = null;
            System.gc();
        } else {
            s.close();
            onlinePlayers.remove(p.getPlayerName());
            p = null;
            System.gc();
        }
    }