Discord.js obtient l'utilisateur par ID
client.users.cache.find(user => user.id === 'USER-ID')
Aci
client.users.cache.find(user => user.id === 'USER-ID')message.author.usernameif(!message.author.id ==`329023088517971969` || !message.member.hasPermission(['MANAGE_GUILD'])) return message.channel.send(`You don't have the permissions to do this!`)
<code here>
client.users.cache.find(user => user.username == 'USERMAME')848450884407918613