Navigate to your Twilio Console and click this Messaging

Name your Messaging Service. "Disciple.Tools" is fine.

Name your Messaging Service
Messaging Service friendly name
What do you want to use this Messaging Service for?

Create a Messaging Service for every Messaging use case you have.

Select what you want to use Messaging for
Notify my users
Market my services
Verify users
Engage in a discussion
Poll or Survey users
Not listed here

What do you want to use this Messaging Service for?\
Leave this section as "Notify my users"

Leave Sender Type as Phone Number and Click "Continue"

Go to your activated Twilio plugin in the WP Admin and copy the webhook url

http://multisite.lwp/wp-json/dt-public/twilio/v1/webhook

Well Done! Proceed to configuring Disciple.Tools