Kotlin Back4app ParseUser authentication

Question

I have 2 simple questions, although it seems simple to me but I couldn't find any helpful materials out there! The question is:

1. How can I login with email and password instead of username and password with Back4app ParseUser using kotlin?

2. How do I sign up a user with google account with Back4app ParseUser using kotlin?

is it because it does not support any of those features?

I tried adding everything and nothing seems to be workkng