def METHOD_NAME(self):
    new_urn = '9001'
    auth = UserSocialAuthFactory.create(slug=self.provider_slug)
    email = auth.user.email
    old_uid = auth.uid
    self._call_command(self._format_single_email_uid_pair_json(email, new_urn))
    auth.refresh_from_db()
    assert auth.uid == self._format_slug_urn_pair(self.provider_slug, new_urn)
    assert not auth.uid == old_uid