[U.S. A2P 10DLC] Updates to the Campaign Creation Process

Twilio has released changes to the US A2P 10DLC Campaign creation process in the Twilio API and Twilio Console to reflect the latest ecosystem guidelines. These changes include collection of new fields regarding user consent (e.g., opt-out keywords and auto-reply messages), as well as enforcement of length requirements to existing and new fields. Please read more about this change from the Twilio support article, and check out code samples and API guidelines from Twilio docs.