I'm not sure what John is using, but they have a very simple example in their documentation. Go here and then click on "twilio-cli" in the right code type selector:

https://www.twilio.com/docs/sms/send-messages

Note that twilio-cli is a totally over-weight, un-necessarily complicated node.js app. If you just want to send SMS from the command line, the curl code is much, much cleaner.

I have not used twilio-cli for anything ... I just write my own scripts with curl - here is my basic 'sms' command:

https://0x.co/6K37UZ

Not everyone can share text using their very own pastebin. That's neat. Cheers.