Feature
* feat: Keep track of deleted unverified users (2174)
* feat: Keep track of deleted unverified users
* Fix test
* Feedback
* Update cron job to anonymise users instead
* Update return type
* Merge branch &39;master&39; into daily_activity_deleted_users ([`15de190`](https://github.com/ocadotechnology/codeforlife-portal/commit/15de19044e8e9d76eccac918306e947e31e9e530))