An alternative to Google Play Store for Android users who want to access the normal app ecosystem without running Google Play Services or other Google binaries on their phones. It violates Google's TOS.
A commonly suggested workaround is creating your own personal dummy account used for nothing but signing into Aurora. Google first rate limiting Aurora's dummy accounts and then beginning to instaban personal dummy accounts is significant because it represents an escalation in their efforts to force all Android users into proprietary walled gardens (Play store).
I don't believe you can authenticate Gmail in email clients with your account password any more - you must create an 'app specific password'.