def save(self):
        # First save the parent form and get the user.
        new_user = super(SignupFormExtra, self).save()

        new_user.first_name = self.cleaned_data['first_name']
        new_user.last_name = self.cleaned_data['last_name']
        new_user.save()

        # Userena expects to get the new user from this form, so return the new
        # user.
        return new_user
Override the save method to save the first and last name to the user
dataset/ETHPy150Open bread-and-pepper/django-userena/demo/profiles/forms.py/SignupFormExtra.save