I am going round in circles with Firebase UI for authentication.
I am using some code I have used previously, which worked OK, which is pretty much based on the samples.
My issue is when using either EmailBuilder orGoogle Builder, my attempts to authenticate from a hardware device give the error:
E/AuthUI: A sign-in error occurred.
com.google.firebase.FirebaseException: An internal error has occurred. [ Identity Toolkit API has not been used in project xxxxxx before or it is disabled...
I've verified the Firebase Sign-in methods and SHAs are set up correctly.
Versions: com.google.gms:google-services: 4.1.0 com.android.support:appcompat-v7: 27.1.1 com.android.support:design: 27.1.1 com.android.support:customtabs: 27.1.1 com.android.support:cardview-v7: 27.1.1 com.google.firebase:firebase-core: 16.0.1 com.google.firebase:firebase-database: 16.0.1 com.google.firebase:firebase-auth: 16.0.3 com.firebaseui:firebase-ui-auth: 4.0.0 com.google.android.gms:play-services-auth: 15.0.1
I've lost a few hours on this already. Any help appreciated.