Solved Cant get Strings From Config.yml

Hello , i dont know how to fix this problem.
I want that when i tip /poslist in minecraft, that the names of the Positions are listet in the Chat.
Sorry for my bad English im from Germany.

PS: Sea is the Name of the Position in the Config.

Code:

package serverextra.cmds;


import org.bukkit.command.Command;
import org.bukkit.command.CommandExecutor;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;

import serverextra.main.Main;

public class Poslist implements CommandExecutor{

    @Override
    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
        Player p = (Player)sender;
        if(p.hasPermission("ServerExtras.pos")) {
            if(args.length == 0) {
        String s =    Main.loc.getString("pos."+p.getName()+".");
            p.sendMessage(s);
            return true;
               
            }else {
                p.sendMessage(Main.pr+"§cBenutze: /poslist");
                return true;
            }
        }else {
            p.sendMessage(Main.pr+"§cDazu hast du keine Berechtigung!");
            return true;
        }
    }

}

Code:

package serverextra.main;

import java.io.File;
import java.util.ArrayList;
import java.util.HashMap;

import org.bukkit.Location;
import org.bukkit.configuration.file.FileConfiguration;
import org.bukkit.configuration.file.YamlConfiguration;
import org.bukkit.entity.Player;
import org.bukkit.plugin.java.JavaPlugin;

import serverextra.cmds.Back;
import serverextra.cmds.ChatClear;
import serverextra.cmds.DelPos;
import serverextra.cmds.Name;
import serverextra.cmds.Pos;
import serverextra.cmds.Poslist;
import serverextra.cmds.Setpos;
import serverextra.cmds.Tpa;
import serverextra.cmds.Vanish;
import serverextra.events.DeathEvent;;

public class Main extends JavaPlugin{
   
    public static File locations;
    public static FileConfiguration loc;
   
    public static String pr = "§8[§bServerExtras§8] §a";
   
    public static HashMap<Player, Player> tpa = new HashMap<Player, Player>();
    public static HashMap<String, Location> back = new HashMap<>();
    public static ArrayList<String> nick = new ArrayList<String>();
    public static ArrayList<String> vanish = new ArrayList<String>();
   
   
@Override
public void onEnable() {
    saveDefaultConfig();
   
    Main.locations = new File("plugins/ServerExtras", "config.yml");
    Main.loc = YamlConfiguration.loadConfiguration(Main.locations);
   
    registerCMDS();
    registerEvents();
   
}
@Override
    public void onDisable() {
    saveConfig();
       
    }
public void registerEvents() {
    this.getServer().getPluginManager().registerEvents(new DeathEvent(), this);

   
}
public void registerCMDS() {
    this.getCommand("tpa").setExecutor(new Tpa());
    this.getCommand("tpaccept").setExecutor(new Tpa());
    this.getCommand("tpac").setExecutor(new Tpa());
    this.getCommand("back").setExecutor(new Back());
    this.getCommand("serverchatclear").setExecutor(new ChatClear());
    this.getCommand("chatclear").setExecutor(new ChatClear());
    this.getCommand("name").setExecutor(new Name());
    this.getCommand("vanish").setExecutor(new Vanish());
    this.getCommand("setpos").setExecutor(new Setpos());
    this.getCommand("pos").setExecutor(new Pos());
    this.getCommand("delpos").setExecutor(new DelPos());
    this.getCommand("poslist").setExecutor(new Poslist());
   
}
}