def METHOD_NAME(self):
    """
    Assert that ``user_id: null`` claim does not crash Open Zaak.
    Regression test for https://github.com/open-zaak/open-zaak/issues/936
    """
    token = generate_jwt_auth(
        self.client_id,
        self.secret,
        user_id=None,
        user_representation=self.user_representation,
        nbf=int(timezone.now().timestamp()),
    )
    self.client.credentials(HTTP_AUTHORIZATION=token)
    zaak = ZaakFactory.create()
    endpoint = reverse(zaak)
    payload = JWTAuth(token.split(" ")[1]).payload
    assert payload["user_id"] is None
    response = self.client.patch(endpoint, data={}, **ZAAK_WRITE_KWARGS)
    self.assertEqual(response.status_code, status.HTTP_200_OK)