Board Thread:Questions and Answers/@comment-32737604-20170731214649/@comment-24356739-20170801000857

If you only generated a set of ID and password but did not use it to sync to a DMM account before, it's not possible to get back that account unfortunately. I'm sorry to hear that :(

If you're planning to start a new Pocket app account, make sure to sync that account to a DMM account even though you're playing exclusively in mobile. It serves as a backup whenever you need to reinstall the mobile app.