I have a simple multisite setup in Drupal 8. I installed the CAS module and verified that at least one user logged in successfully using our university's CAS server.

I can see the user at /admin/people, but I cannot see his entry in the database. I looked in the tables users, users_data, and users_field_data, and all I can see is the admin user (me).

Where are the users located in the database?

I need to know for a custom module I am developing. FWIW I do have "Auto Register Users" enabled in the module configuration.

  • Haven't figured it out yet, but you can use User::load($user_id) to load a user entity, and it works with CAS users just fine. Commented Jun 23, 2017 at 16:46

1 Answer 1


For D8, CAS requires External Authentication module.

  • External Authentication maintains a db table called authmap.
  • CAS maintains a table named cas_login_data.

I suspect the data you're looking for is in one of those tables.

  • Looks like it's in authmap! How does User::load($uid) know to load from authmap though? Commented Aug 3, 2017 at 18:53
  • 1
    I looked at both modules twice, and couldn't figure it out for the life of me. CAS is definitely leveraging externalauth events to access and alter the data as a user is registered, but I couldn't find the start of the chain. Couldn't find how externalauth hooked into core mechanisms. Sorry ¯\_(ツ)_/¯
    – daggerhart
    Commented Aug 8, 2017 at 18:23

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