Configure your installation and link it to your G9Push account.
An admin account already exists in this database — most likely because you brought your existing database with you to new hosting. Your subscribers and all other data are safe and will NOT be touched. If you remember the old password, just sign in directly. If not, you can reset the password here: enter the same email that admin uses, plus a new password.
Setup issues? Make sure:
api/config.php can reach https://g9push.com over HTTPS.