<p>Specify the format that the password field is using.</p> <p>Use 'internal' if you want the external database to manage usernames and email addresses, but Moodle to manage passwords. If you use 'internal', you must provide a populated email address field in the external database, and you must enable the \auth_db\task\sync_users scheduled task. Moodle will send an email to new users with a temporary password.</p>