Send a message to a channel.
        Args:
            title: Message title.
            title_link: Link of the message title.
            message: Message body.
            color: Message line color on Slack. This parameter should be one of the following values: 'good', 'warning',
             'danger' or any hex color code.

        Returns:
            response: Response of Slack API.

        Raises:
            Exception:

def __send_notification(self, message, title, title_link='', color='good',
                            fields='', log_level=LogLv.INFO):
        """Send a message to a channel.
        Args:
            title: Message title.
            title_link: Link of the message title.
            message: Message body.
            color: Message line color on Slack. This parameter should be one of the following values: 'good', 'warning',
             'danger' or any hex color code.

        Returns:
            response: Response of Slack API.

        Raises:
            Exception:
        """
        if log_level < self.log_level:
            return None

        payload = self.__build_payload(message, title, title_link, color, fields)

        try:
            response = self.__post(payload)

        except Exception:
            raise Exception(traceback.format_exc())

        return response