Refs #6109 cid should not require token_auth authentication. Note; this may fail the test with changes in Tracker.php
Refs #3490 Adding segment 'userId==' + some '&segment=userId==' integration tests + doc blocks
Refs #3490 Displaying User ID in the Visitor log
Refs #3490 Displaying User ID in the Visitor log
Refs #3490 hide user_id attribute from Live API responses when requesting user is anonymous
Refs #3490 Display User ID in the Visitor Profile, in the Visitor log and Last visits widget link/tooltip opening the Visitor profile