我正在開發一個不和諧項目，在該項目中我需要錄制用戶聲音，我正在關注此文檔。到目前為止，這就是我寫的：const fs = require('fs');const Discord = require('discord.js');const client = new Discord.Client();client.once('ready', () => {    console.log('Ready!');});client.on('message', async message => {    if (message.content === 'a' && message.member.voice.channel) {        const connection = await message.member.voice.channel.join();        const audio = connection.receiver.createStream('user_id?', { mode: 'pcm' });        audio.pipe(fs.createWriteStream('user_audio'));    }});client.login('token');但問題是 user_audio 文件總是空的！