It is always a good idea to keep all your data in a location that has guaranteed uptime and/or data backup. The free sandbox environment has no SLA, uptime guarantee, or data retention agreement. It’s really made for “kicking the tires” of DreamFactory. That said, after looking into the issue I believe all your data is still there–it’s just that the logins are being directed at the wrong DB and therefore failing. Once we fix this, everyone should have their logins and data back.