Verify a User via SMS with Express and Twilio Verify

This is an example of how to verify users via SMS using Express and Twilio Verify. The app allows users to enter their phone number and receive a verification code via text message. Once they submit the verification code, the app checks it against the verified phone number to confirm its validity. If valid, the user's account is authorized, otherwise an error message is displayed. The backend uses the Twilio API to send and verify SMS messages.