98a81bef17
Backport #30206 by wxiaoguang 1. check `IsActive` before calling `IsLastAdminUser`. 2. Fix some comments and error messages. 3. Don't `return err` if "removing file" fails in `DeleteUser`. 4. Remove incorrect `DeleteInactiveEmailAddresses`. Active users could also have inactive emails, and inactive emails do not support "olderThan" 5. Add tests Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>