How to verify a user's phone number in your Replit app

Twilio’s tutorial explains how to add phone-number verification to a Replit-hosted Node.js and Express application using Twilio Verify, illustrated through a puppy-name voting app that permits one vote per verified number. Developers create a Twilio Verify Service, import the sample GitHub repository into Replit, and store Twilio account, API key, API secret, and Verify Service SID credentials in Replit’s Secrets manager rather than source code. The application sends SMS one-time passwords through the Verify API and checks user-submitted six-digit codes, allowing further actions only when Twilio returns an approved status. Testing requires phone numbers in E.164 format, while troubleshooting considerations include correctly configured secrets and verification-request rate limits. For production use, the tutorial suggests adding persistent database storage for verified voters and vote counts, and notes that the same Verify Service can support WhatsApp, email, or voice verification by changing the messaging channel.

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