<Why users still login firebase even they do not r...

# stackoverflow

[user]

Why users still login firebase even they do not register to app in jetpack compose?
I have login screen in android jetpack compose, so when I register with e-mail to firebase, I can login to app with below codes, but when I typing random e-mails which I never register, I can login to app, how can I control my login function if I do not have register e-mail, user will never success to login my app?
viewmodel:
@HiltViewModel
class ViewModel @Inject constructor(
val db: FirebaseFirestore,
val auth: FirebaseAuth,

) : ViewModel() {...