Add a button to the admin area, use sitemetadata to save username and current time when clicked.
https://phuks.co/canary basic text in place for now.
Edit: This will remain High Priority so we all can see. This will not be able to be accessed by admins. For now only I will alter this file.
History - https://phab.phuks.co/source/throat/history/master/app/templates/canary.html