def post_data(self, url, params):
        """
            POST some stuff to change title/date/body or create experiment
        """
        url = urljoin(self.endpoint, url)
        headers = {'Authorization': self.token}
        req = requests.post(url, headers=headers, data=params, verify=False)

        if req.status_code == 204:
            return True

        if req.status_code == 404:
            raise NotFoundError()

        try:
            data = req.json()
        except ValueError as e:
            raise JSONReadError(
                'Read failed from API: %s' % str(e)
            )

        if not req.ok:
            msg = [data[m] for m in ("id", "message") if m in data][1]
            raise DataReadError(msg)

        return data
POST some stuff to change title/date/body or create experiment