This is the public Twilio REST API.
curl \ -u "$API_USER:$API_PASS" \ https://conversations.twilio.com/v1/Roles
curl \ -u "$API_USER:$API_PASS" \ https://conversations.twilio.com/v1/Users
curl \ -u "$API_USER:$API_PASS" \ https://conversations.twilio.com/v1/Services