custom auth backend django

auth.py

class CustomAuthenticationBackend:

    def authenticate(self, request, email_or_phone=None, password=None):
        try:
             user = User.objects.get(
                 Q(email=email_or_phone) | Q(phone=email_or_phone)
             )
             pwd_valid = user.check_password(password)
             if pwd_valid:            
                 return user
             return None
        except User.DoesNotExist:
            return None

    def get_user(self, user_id):
        try:
            return User.objects.get(pk=user_id)
        except User.DoesNotExist:
            return None