Goal

• As a user, I want to authenticate using an unique attribute that is only assigned once rather than using an email address that may be reassigned.
• Employee number, for example, is guaranteed unique and can be stored in unique_name or preferred_username in the profile.

Acceptance criteria

A list of verification conditions, successful functional tests, or expected outcomes in order to declare this story/task successfully completed.

• Verify that users can login using the selected identifier instead of email address.