def save(self):
        self.siteconfig.set("auth_require_sitewide_login",
                            not self.cleaned_data['auth_anonymous_access'])

        auth_backend = self.cleaned_data['auth_backend']

        if auth_backend in self.auth_backend_forms:
            self.auth_backend_forms[auth_backend].save()

        super(AuthenticationSettingsForm, self).save()

        # Reload any important changes into the Django settings.
        load_site_config()
Save the form.
dataset/ETHPy150Open reviewboard/reviewboard/reviewboard/admin/forms.py/AuthenticationSettingsForm.save