Create ability to hook into the user logout

Pushed the code to issue fork for easier maintenance. The code does work, the hook (when added) is triggered if user is automatically logged out. Leaving it to RTBC.

Rebased the branch so it includes the new GitLab CI testing. Test are passing now, so ready to merge.

cedrichillion → made their first commit to this issue’s fork.

Automatically closed - issue fixed for 2 weeks with no activity.