Setting up 2FA

Steps to be performed on the Firebase project the TMF instance for the member is located.

1. enable SMS Multi-factor Authentication: (https://console.firebase.google.com/u/0/project/project-id/authentication/providers), under advanced.
2. enable Android Device Check API to have silent app verification instead of a captcha: https://console.cloud.google.com/apis/library/androidcheck.googleapis.com?project=project-id
3. run the script create_firebase_apps in tmf_flavors/tools/. This will add the SHA-256 fingerprints of the apps to the firebase projects, which is necessary for the silent app verification on android to work and set the APNs Atuhentication Key for ios apps in the firebase projects, which is necessary for the silent app verification on ios to work.