get a voice channel and mute all members discord.js v12 code example

Example: mute everyone in call discord.js

client.on('message', (message) => {
    if (message.content == '/muteAll') {
        let channel = message.member.voiceChannel;
        for (let member of channel.members) {
            member[1].setMute(true)
        }
     }
});