如何停止播放机器人音乐？(Discord.js)

const Discord = require('discord.js');
const client = new Discord.Client();

const { Player } = require('discord-music-player');
const player = new Player(client, {
    leaveOnEmpty: false, // 保留在语音频道中，即使队列为空
});

client.once('ready', () => {
    console.log('机器人已登录');
});

client.on('message', async (message) => {
    if (message.content.startsWith('!play')) {
        // 将音乐添加到播放列表中
        const voiceChannel = message.member.voice.channel;
        const music = message.content.slice(6).trim();
        player.play(message, music, { firstResult: true });
    }

    if (message.content.startsWith('!stop')) {
        // 停止播放音乐
        player.stop(message);
    }
});

client.login('YOUR_TOKEN_HERE');