Find a player in a client by id

I want to find a player in a client by id and give a role to him. the pic is error and below is the code How can I get a member in a client (AND ADD A ROLE)?
let user = client.users.cache.get(id);
console.log(client.users)
user.roles.add("1072269497299374130");
let user = client.users.cache.get(id);
console.log(client.users)
user.roles.add("1072269497299374130");
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Unknown User
Unknown User17mo ago
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d.js docs
d.js docs17mo ago
Documentation suggestion for @apenrl:method GuildMemberManager#addRole() Adds a role to a member.
#[derive(ApEnrl)]
THxx