DELETE /v2/Services/{ServiceSid}/Roles/{Sid}
curl \
-X DELETE https://ip-messaging.twilio.com/v2/Services/{ServiceSid}/Roles/{Sid} \
--user "username:password"
curl \
-X DELETE https://ip-messaging.twilio.com/v2/Services/{ServiceSid}/Roles/{Sid} \
--user "username:password"