Plugin To store Player data to MongoDB database

hello_Hello.java

package net.ammart.plugin.hello;
import org.bukkit.plugin.java.JavaPlugin;


public final class Hello extends JavaPlugin{

    @Override
    public void onEnable() {
        getCommand("Hello").setExecutor(new HelloCommand());
        System.out.println("Hello Plugin Started");
    }
    @Override
    public void onDisable() {

    }

}

hello_HelloCommand.java

package net.ammart.plugin.hello;

import com.mongodb.client.MongoClient;
import com.mongodb.client.MongoClients;
import com.mongodb.client.MongoCollection;
import com.mongodb.client.MongoDatabase;
import org.bson.Document;
import org.bukkit.ChatColor;
import org.bukkit.command.Command;
import org.bukkit.command.CommandExecutor;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;

public class HelloCommand implements CommandExecutor {

    @Override
    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
        sender.sendMessage("Command Executing");
        if(sender instanceof Player){
            Player player = (Player)sender;
            String Pname = player.getName();
            String PUUID = player.getUniqueId().toString();

            if (sender.hasPermission("hello.database.add")) {
                //Modify your Databse Files.
                MongoClient mongoClient = MongoClients.create("");
                MongoDatabase dataBase = mongoClient.getDatabase("");
                MongoCollection<Document> collection = dataBase.getCollection("");
                Document PlayerData = new Document("Name",Pname).append("UUID",PUUID);
                collection.insertOne(PlayerData);
                return true;
            }
            else{
                player.sendMessage(ChatColor.RED+"You Do not have Permission To execute that Command");
            }
        }
        else{
            sender.sendMessage("You're A Console");
            return true;
        }


        return true;


    }
}