public Credentials getCredentials() {
        return credentials;
    }
Returns the credentials that the user originally provided to Guacamole
prior to being redirected to the Duo service.

@return
    The credentials that the user originally provided to Guacamole prior
    to being redirected to the Duo service.
extensions/guacamole-auth-duo/src/main/java/org/apache/guacamole/auth/duo/DuoAuthenticationSession.java