Retreiving joomdle user id

Hi, its been a while and still running strong

I have installed google analytics on both moodle and joomla and currently track user ids separately. For instance, in moodle i use the global $USER->id. However it would be much nicer to use the joomlde user id for tracking purposes as this spans both joomla and moodle.

Can somebody please post the session variable that identifies the user in joomlde please?

Thanks,

Andy