code: public static byte[] passwordBytes(AbstractConfig config, String key, Charset charset) {
      final Password password = config.getPassword(key);
      return password.value().getBytes(charset);
    }
docs: Method is used to return an array of bytes representing the password stored in the config.
  
  @param config  Config to read from
  @param key     Key to read from
  @param charset Charset to use
  @return byte array containing the password