How to work with ClientID in Google Analytics?

Question

Google Analytics

Hello. Please tell me or give a sane link to the google analytic documentation where I can pass the clientId value and get some information about the user.
In particular, I need to know where a particular user came from (search engine, social networks, advertising, etc.) As well as the link from which the transition was made (campaign, source, channel)
Is it possible to get data through GA clientId in this way. I would be very grateful.

Answer 1

Like this

ga('create', 'UA-XXXX-Y', { 'userId': 'USER_ID' });
ga('send', 'pageview');

And receive like this

ga(function(tracker) {
  var clientId = tracker.get('clientId');
});