Find channel discord js

// Insert the Channel ID in the brackets. TO find that, right click the
// channel and select "Copy ID". Discord Developer must be on.
let channel = message.guild.channels.cache.get(channelid)

// Set the bot's presence (activity and status)
client.on("ready", () => {
    client.user.setPresence({
        game: { 
            name: 'my code',
            type: 'WATCHING'
        },
        status: 'idle'
    })
})