I pushed an app on the google play store and the app was rejected with the following issue.
Issue: Need login credentials for app review
My app uses the only mobile number as a login option and we are using Firebase messaging services to send OTP messages.
Google in their email also stated that:
If your app normally uses 2-Step Verification (e.g. SMS verification), biometrics (e.g. a fingerprint or face scan) or a location-dependent password (e.g. geo-gate), please provide valid demo credentials that we can use instead.
I am wondering how to provide a valid mobile number and OTP for them to validate this.