utils/notification_service.py/Message/post
class Message:    def post(self):
        print("Sending the following payload")
        print(json.dumps({"blocks": json.loads(self.payload)}))

        text = f"{self.n_failures} failures out of {self.n_tests} tests," if self.n_failures else "All tests passed."

        self.thread_ts = client.chat_postMessage(
            channel=os.environ["CI_SLACK_REPORT_CHANNEL_ID"],
            blocks=self.payload,
            text=text,
        )