find guild by id discordjs v11 code example
Example 1: get channel id discord js v12
client.channels.cache.get('id')
Example 2: discord js fetch user
//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);