https://api.drupal.org/api/drupal/core%21modules%21migrate_drupal%21src%21Plugin%21migrate%21field%21d7%21UserReference.php/function/UserReference%3A%3AentityId/11.x
function UserReference::entityId | Drupal API
functiondrupalapi
https://developer.broadcom.com/xapis/all-apps-org-policy/latest/data-structures/UserReference/
UserReference | All Apps Org - Policy
Expanded policy last updater details
all appspolicy