Phone Authentication with Twilio, NextJS and Supabase

This article is a hands-on tutorial showing how to implement phone number authentication and SMS OTP verification in a Next.js app using Twilio and Supabase; it covers enabling phone signup in Supabase, adding UI state and inputs to toggle between email and phone sign-up, sending sign-in requests with supabase.auth.signIn, and creating a verification page that calls supabase.auth.verifyOTP to validate the received code, with complete example code snippets.