1.15.2 Unrecognized problem at writing the plugin

I am writing a plugin called IronXMessages. Here is my code

Code (Java):

package com.thunderkofy;

import org.bukkit.ChatColor;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.entity.PlayerDeathEvent;
import org.bukkit.event.player.PlayerJoinEvent;
import org.bukkit.event.player.PlayerQuitEvent;
import org.bukkit.plugin.java.JavaPlugin;

public class ironxmessages extends JavaPlugin implements Listener {
    @Override
    public void onEnable(){
        System.out.println("Thanks for having me as a plugin at your server :)");
        saveDefaultConfig();
    }
    @Override
    public void onDisable() {
        System.out.println("Goodbye dood!");
    }
    @EventHandler
    public void onPlayerJoin(PlayerJoinEvent e) {
        Player p = e.getPlayer();
        if(p.hasPlayedBefore()) {
            String joinmsg = getConfig().getString("joinmsg");
            System.out.println(ChatColor.GREEN + p.getName() + " has joined the server!");
            e.setJoinMessage(joinmsg);
            return;
        }
        if(!p.hasPlayedBefore()) {
            String firstjoinmsg = getConfig().getString("firstjoinmsg");
            System.out.println(ChatColor.GREEN + p.getName() + " has joined the server for the first time!");
            e.setJoinMessage(firstjoinmsg);
            return;
        }
    }
    @EventHandler
    public void onPlayerQuit(PlayerQuitEvent e) {
        Player p = e.getPlayer();
        String quitmsg = getConfig().getString("quitmsg");
        System.out.println(ChatColor.GREEN + p.getName() + " has left the server!");
        e.setQuitMessage(quitmsg);
        return;
    }
}

I seriously see no problem in this but when I start the server, the plugin f**ks me.


as you can see the plugin doesn't work, and also, the code which I wrote to welcome the player on join and firstjoin etc etc doesn't work.

Please help!

 

Whoops! How did I even forgot to register the events.

 

Config.yml ans plugin.yml is alright, I was a idiot who forgot to register the events xD. Anyways thanks

 

What command sir?

 

Oh, I did that earlier but when the problem arrived, I removed it from plugin.yml to see if it works or not. But anyways... Ty