Make a struct clonable in Rust

rust_cloneable_struct.md

Make a struct clonable in Rust

Also, we make it debuggable

fn main() {
    let user = User {
        active: true,
        username: String::from("someusername123"),
        email: String::from("someone@example.com"),
        sign_in_count: 1,
    };
    println!("{:?}", user);

    let user2 = User {
        email: String::from("another@example.com"),
        ..user.clone()
    };
    println!("{:?}", user2);
}

// This is where the magic happens!
#[derive(Clone, Debug)]
struct User {
    active: bool,
    username: String,
    email: String,
    sign_in_count: u64,
}