Function scrypt_simple 

pub fn scrypt_simple(
    password: &[u8],
    salt: &[u8],
    log_n: u8,
    r: u32,
    p: u32,
) -> String

Temporarly binded here for a specific use case, don’t rely on this.

Copied and modified from: https://github.com/RustCrypto/password-hashing/blob/master/scrypt/src/simple.rs Because rand is outdated, I cannot use the crate directly