def send_slack_message(message_body: str, slack_url: str) -> None:
    headers = {"Content-Type": "application/json"}
    response = requests.post(slack_url, json={"text": message_body}, headers=headers)
    if response.status_code != 200:
        raise ValueError(
            f"Request to slack returned an error {response.status_code}, "
            f"the response is:\n{response.text}"
        )