Function hash_password

ch_09/src/routes/authentication.rs:67–73

(password: &[u8])

}

fn hash_password(password: &[u8]) -> String {
    let salt = SaltString::generate(&mut OsRng);
    Argon2::default()
        .hash_password(password, &salt)
        .expect("Failed to hash password")
        .to_string()
}

fn verify_password(
    hash: &str,