If you are using the mobile app on iOS, after email verification you will be prompted to set up a Passcode and Face/Touch ID to be able to enter the app fast and secure without the need to enter a password every time.
I turned off Face/Touch ID and don’t know how to switch it back on
To turn back on face/touch ID:
Open Settings
Search for the GrabrFi app and open it
Turn Face/Touch ID back on