Lost access to the owner account?

1. Copy this code: FlWKuD0MPFqDrZ5tJmsvUvD1
2. In the Back4app dashboard open Settings → Environment variables, add OWNER_RESET_TOKEN with that code, save and Deploy now.
3. Within 30 minutes of that deploy, come back here and enter the same code with a new password.

Knowing the owner's e-mail is not enough: the code has to reach the app through the dashboard, which only the account owner can open. The code works once.