def send(self):
        """
        Send the SMS/MMS message.
        Set self.sid to return code of message.
        """
        url = (
            "https://api.twilio.com/2010-04-01/Accounts/"
            + self._auth[0]
            + "/Messages.json"
        )
        data = {
            "From": self.from_,
            "To": self.to,
            "Body": self.body,
            "MediaUrl": self.attachments,
        }

        if self.verbose:
            print(
                "Debugging info"
                "\n--------------"
                "\n{} Message created.".format(timestamp())
            )

        try:
            resp = requests.post(url, data=data, auth=(self._auth[0], self._auth[1]))
            resp.raise_for_status()
        except requests.exceptions.RequestException as e:
            exc = "{}\n{}".format(e, resp.json()["message"])
            raise MessageSendError(exc)

        self.sid = resp.json()["sid"]

        if self.verbose:
            print(
                timestamp(),
                type(self).__name__ + " info:",
                self.__str__(indentation="\n * "),
                "\n * HTTP status code:",
                resp.status_code,
            )

        print("Message sent.")

        return resp
Send the SMS/MMS message.
        Set self.sid to return code of message.