docs: def client_post(self, url, **kwargs):
          """Send POST request with given url and keyword args."""
          response = requests.post(self.make_url(url),
                                   data=json.dumps(kwargs),
                                   headers=self.headers)
          if not response.ok:
              raise Exception(
                  '{status}: {reason}.\nCircleCI Status NOT OK'.format(
                      status=response.status_code, reason=response.reason))
          return response.json()