Message "Login failed due to: No user for client certificate..." is too vague for troubleshooting

Issue

• Client authentication using certificates is not working in Hawtio
• There is a message that appears on the logs, as follows

  19:21:00 WARN {qtp1680841335-43} : Login failed due to: No user for client certificate: CN="bla", OU=bla, OU=bla, DC=bla, DC=bla

• The message should show more details, like the user name that is not matched for the certificate, that is set up on the Artemis security files.