Function saml_rs::utils::to_hex_string

pub fn to_hex_string(bytes: Vec<u8>, join: Option<&str>) -> String

Takes a Vec and turns it into a String

With an optional “join” string to allow you to space it out etc.

From https://illegalargumentexception.blogspot.com/2015/05/rust-byte-array-to-hex-string.html