Once the new fields are available in the centralauth database, we'll need to code to populate those fields as new users are created and attached to the global users.
Related Gerrit Patches:
|mediawiki/extensions/CentralAuth : master||Populate lu_local_id and lu_global_id on new user attach|
|Open||None||T66475 Make crosswiki bits and pieces truly global (tracking)|
|Open||None||T5525 Cross-wiki watchlists|
|Resolved||Niharika||T142507 Have CentralAuth populate the local_user_id and global_user_id columns as new users are attached|
|Resolved||Marostegui||T141951 Add local_user_id and global_user_id fields to localuser table in centralauth database|