As of 2020 March 5th, we will begin the database cleanup process.
All server accounts which were not logged into since 2019 will be erased.
This is approximately 89% of all server accounts.

If you have an old account which you would like to keep then make sure that you log in with it now.
If you miss this announcement, you can still ask your account to be recovered in the support forum until 2020/04/01. After that, these accounts will be lost forever.