code: def send_button_message(self, recipient_id, text, buttons, notification_type=NotificationType.regular):
          
          return self.send_message(recipient_id, {
              "attachment": {
                  "type": "template",
                  "payload": {
                      "template_type": "button",
                      "text": text,
                      "buttons": buttons
                  }
              }
          }, notification_type)
docs: Send text messages to the specified recipient.
          https://developers.facebook.com/docs/messenger-platform/send-api-reference/button-template
          Input:
              recipient_id: recipient id to send to
              text: text of message to send
              buttons: buttons to send
          Output:
              Response from API as <dict>