@Override
    public List<String> determineRequestedAttributeDefinitions(final RegisteredServiceAttributeReleasePolicyContext context) {
        return getAllowedAttributes();
    }
Return only the collection of allowed attributes out of what's resolved
for the principal.

@author Misagh Moayyed
@since 4.1.0
core/cas-server-core-authentication-attributes/src/main/java/org/apereo/cas/services/ReturnEncryptedAttributeReleasePolicy.java