Solved Bossbar help

I'm trying to make a bossbar, but it does not seem to appear. Does anyone have any ideas? If so, that would be greatly appreciated!

Code:

import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.boss.BarColor;
import org.bukkit.boss.BarStyle;
import org.bukkit.boss.BossBar;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.player.PlayerJoinEvent;

public class Bossbar implements Listener {

    @EventHandler
        public void onPlayerJoin (PlayerJoinEvent e) {
        Player p = e.getPlayer();
   
            String message = (ChatColor.translateAlternateColorCodes('&', ChatColor.GOLD + "&LHAPPY " + ChatColor.BLACK + "&LHALLOWEEN"));
            BarColor color = BarColor.PURPLE;
            BarStyle style = BarStyle.SOLID;
            BossBar bar = Bukkit.createBossBar(message, color, style);
            bar.addPlayer(p);
}
}