I get java.lang.NullPointerException@Referenceprivate SlingRepository repository;private Session session;.....try {          LOGGER.debug("trying to get session..");          repository.login();          session = repository.loginAdministrative(null);          LOGGER.debug("session " + session);    ...

I have a follow up question.Looks like I do not have access to the session from the LDAP callback. How do I get the user stored in crx to update its property in callback method? Do I need to connect to Repo programmatically? 

Ah found the issue. I had to refresh "Day CRX LDAP Authenticationcom.day.crx.crx-auth-ldap" bundle.

Very helpful link. Thanks!