@Override
    public AuthorizationResult checkAccessAllowed(AthenzAccessToken accessToken, AthenzResourceName resourceName, String action) {
        return checkAccessAllowed(accessToken, null, resourceName, action);
    }
The default implementation of {@link Zpe}.
This implementation is currently based on the official Athenz ZPE library.

@author bjorncs
vespa-athenz/src/main/java/com/yahoo/vespa/athenz/zpe/DefaultZpe.java