Add SMS Verification in a React Native App Using Node.js and Express

Let's create a mobile app that allows users to sign up using their phone number and SMS 2FA. We'll use React Native for the UI and a Node/Express server on the backend, with Vonage APIs to integrate features like two-factor authentication. The app will request verification codes via SMS and allow users to verify their code once they receive it. Additionally, we'll enable users to send invites to friends via SMS.

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