Error "cannot move out of borrowed content" in Rust: how to fix?

Hi everyone! I started learning Rust and encountered an error I can't understand. I have a `User` struct and a function that should modify its `name` field. Here's the code: ```rust struct User { name: String, age: u32, } fn update_name(user: &User, new_name: String) { user.name = new_name; // Error here } fn main() { let user = User { name: String::from("Alice"), age: 30, }; update_name(&user, String::from("Bob")); println!("{}", user.name); } ``` The compiler outputs: `cannot move out of borrowed content` and `cannot move out of behind a shared reference`. I understand that I'm passing `&User` — this is an immutable reference, but I want to change the `name` field. If I change the signature to `&mut User`, the error changes to `cannot borrow immu