yultyyev

Add Firebase Authentication (Phone SMS OTP, Google Sign-In, Email/Password) to a Better Auth app using the better-auth-firebase-auth plugin. Use when adding phone authentication to Better Auth without Twilio, integrating Firebase Auth with Better Auth sessions, working with the better-auth-firebase-auth package, or deciding between Firebase Phone Auth and Better Auth's built-in phoneNumber plugin.

Use Firestore as the database adapter for Better Auth (Firebase Admin SDK). Use when storing Better Auth users, sessions, accounts, and verification tokens in Firestore, migrating from Auth.js/NextAuth Firebase adapter to Better Auth, setting up Better Auth with a Firebase/Firestore backend, or troubleshooting Firestore index errors and FIREBASE_PRIVATE_KEY issues.