def METHOD_NAME(self):
    """Create a new run for tracking."""
    url = self.base_url + "/runs/create"
    # user_id is deprecated and will be removed from the API in a future release
    payload = {
        "experiment_id": self.experiment_id,
        "start_time": get_current_time_millis(),
        "user_id": _get_user_id(),
    }
    r = requests.post(url, json=payload)
    run_id = None
    if r.status_code == 200:
        run_id = r.json()["run"]["info"]["run_uuid"]
    else:
        print("Creating run failed!")
    return run_id