FightSystem/src/me/yaruma/fightsystem/commands/DeclineCommand.java

package me.yaruma.fightsystem.commands;

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

public class DeclineCommand implements CommandExecutor {
    @Override
    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
        if(!(sender instanceof Player)) {
            return false;
        }
        Player player = (Player) sender;

        Commands.declineInvitation(player);
        return false;
    }
}