Only the usernames of those who have specially requested access through payment are stored on as a proof of purchase, and no other user identifiable information is stored on any servers or databases. All other information are encrypted and stored on the user's own device for a very short period of time. A user may make a GET request to the '/logout' endpoint to logout of and remove all information from their device, or by contacting using the contact information provided by the payment vendor, or by writing an email to solved [@] azwad.org.