code: function send(message, callback) {
    const suppliedCallback = callback || function () {};
    if (!message) {
      return suppliedCallback(new Error('No message'));
    }
    const requestParams = {
      url: this.webhook,
      body: extend(this.options, { text: message }),
      json: true
    };
    return request.post(requestParams, function (err, res, body) {
      if (err || body !== 'ok') {
        return suppliedCallback(err || new Error(body));
      }
      return suppliedCallback(null, body);
    });
  }
docs: Handles the sending of a message to an Incoming webhook
  @param {text} Message text
  @param {function} Callback function for post execution