Struct Base91Decoder 

pub struct Base91Decoder;

The Base91 decoder, call: let base91_decoder = Decoder::<Base91Decoder>::new() to create a new instance And then call: result = base91_decoder.crack(input) to decode a base91 string The struct generated by new() comes from interface.rs

use ares::decoders::base91_decoder::{Base91Decoder};
use ares::decoders::interface::{Crack, Decoder};
use ares::checkers::{athena::Athena, CheckerTypes, checker_type::{Check, Checker}};

let decode_base91 = Decoder::<Base91Decoder>::new();
let athena_checker = Checker::<Athena>::new();
let checker = CheckerTypes::CheckAthena(athena_checker);

let result = decode_base91.crack("TPwJh>Io2Tv!lE", &checker).unencrypted_text;
assert!(result.is_some());
assert_eq!(result.unwrap()[0], "hello world");