I'm trying to integrate Google SSO into my Django app, but I keep running into an issue

I'm 99% sure it has to do with my custom authentication model, as shown below:

    from django.contrib.auth.backends import ModelBackend
from django.contrib.auth import get_user_model
from django.db.models import Q

UserModel = get_user_model()

class UsernameOrEmailBackend(ModelBackend):
    def authenticate(self, request, username=None, password=None, **kwargs):
        try:
            user = UserModel.objects.get(Q(username__iexact=username) | Q(email__iexact=username))
        except UserModel.DoesNotExist:
            return None
        else:
            if user.check_password(password) and self.user_can_authenticate(user):
                return user
        return None

The goal was to allow users to sign in with a combination of email/username or password. But now, when i try to integrate Google SSO, it always redirects to the allauth signup page because Google doesn't provide a username.

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