(async () => {
  const caseId = "003abc000123xyzabc";

  try {
    console.log({ URL: req.url, body: req.body });
    if (req.url.endsWith("token")) {
      res.json({ access_token: "TOKEN" });
    } else if (req.url.endsWith(caseId)) {
      res.json({
        id: caseId,
        CaseNumber: 1024,
      });
    } else {
      // create a case
      res.json({ id: caseId });
    }
  } catch (error) {
    res.json({
      error: {
        message: error.message,
      },
    });
  }
})();