How to implement Copy and Clone for a struct with a String field (or any non-Copy type)?

Hi everyone! I've just started learning Rust and ran into a problem that I can't solve for the second day. I'm writing a simple program for working with users, and I have this struct: ```rust struct User { id: u32, name: String, email: String, } ``` I need this struct to be copyable and passable into functions without borrowing — that is, I want to implement the `Copy` and `Clone` traits for it. But the compiler complains when I write `#[derive(Copy, Clone)]`: ``` error[E0204]: the trait `Copy` may not be implemented for this type --> src/main.rs:1:10 | 1 | #[derive(Copy, Clone)] | ^^^^ 2 | struct User { 3 | name: String, | ---- this field does not implement `Copy` ``` I understand that `String` does not implement `Copy`, because