protected OAuth20Code addCode(final Principal principal, final OAuthRegisteredService registeredService,
                                  final Collection<String> scopes) throws Throwable {
        return addCodeWithChallenge(principal, registeredService, null, null, scopes);
    }
This is {@link AbstractOAuth20Tests}.

@author Misagh Moayyed
@since 5.0.0
support/cas-server-support-oauth/src/test/java/org/apereo/cas/AbstractOAuth20Tests.java