Crowd access logs does not log the username

Summary

The current Crowd documentation for enabling access logs How do I enable Access Logging for Crowd? suggests that adding the %{X-AUSERNAME}o attribute in the Tomcat Valve will record the username in the access logs. However, after testing, this is not working as documented because the header %{X-AUSERNAME}o does not exist in the Crowd requests.

Steps to Reproduce

1. Install a vanilla Crowd instance
2. Enable access logging by following the steps described in this KB How do I enable Access Logging for Crowd?
3. Restart Crowd for the changes to take effect
4. Access the Crowd login page
5. Check the newly created access log file

Expected Results

According to the documentation, the username should be documented with the incoming requests

Actual Results

The username is empty in all the requests

Workaround

There is no workaround at the moment