Authenticate chatbot users with SMS one-time passcode

In this code pattern, learn how to authenticate users on your chatbot with an SMS one-time passcode (OTP). And, some conversations are confidential, so chatbots must verify the authenticity of its users. One example of this is a customer who holds an insurance policy who uses a chatbot to get more information about that insurance policy. Sending a one-time passcode through SMS is a popular way to identify a user. This code pattern shows how to build a chatbot that authenticates users through an SMS one-time passcode.