Save "Text" in Devices/V. Twillo Notification?

First off you may want to remove your screenshot since it contains your Twilio API details or at least edit that out.

You may want to use my community Twilio driver instead as the past messages are stored as events and visible on the device too. One user of it views the last message on the dashboard as an example.

Details are here and you can install it via Hubitat Package Manager: