def send_ephemeral(slack_client, channel: str, user: str, text: str):
    """
    chat.postEphemeral to a channel and user

    https://api.slack.com/methods/chat.postEphemeral
    """
    return slack_client.api_call("chat.postEphemeral",
                                 channel=channel,
                                 user=user,
                                 text=text,
                                 as_user=True)