Money Command

So I created a command where you do /money <player> <amount>. I have no idea how to add this amount to the config. Also I need it to be a string.

Code:

package skits.commands;

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

import skits.main.sKitmain;
import skits.util.CurrencyAPI;

public class MoneyCommand implements CommandExecutor  {
    @Override
    public boolean onCommand(CommandSender  sender, Command cmd, String label, String[] args) {
        if(!(sender instanceof Player)) {
            return false;   
        } 
        String i = args[1];
        String p = args[0];
            giveMoney(p, i); 
              return true;
        }
    private void giveMoney(String p, String i) {
        sKitmain.config.set(player.getName() + ".Money", 
                sKitmain.config.getInt(player.getName() + ".Money", 0) + i);
        player.sendMessage(ChatColor.BLUE + "KitPVP> " + ChatColor.GRAY + player.getName() + " you have recieved $" + i + " for killing a player!");
    }
       
       
    }
    }

 

@ChucknorisSR save your config