Obtenha ID do canal Discord JS V12
client.channels.cache.get('id')
Crazy Cod
client.channels.cache.get('id')//With .then
<client>.users.fetch('UserID').then((user) => {
console.log(user);
}).catch(console.error);
//with async/await
const user = await <client>.users.fetch('UserID').catch(console.error);
console.log(user);