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Identity Platform
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Overview
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Identity Platform
Product overview
Quickstarts
Sign in users with email and password
How-to guides
All how-to guides
Signing in users
Upgrading to Web SDK v9
Signing in users on App Engine
Signing in users with email and password
Signing in users with Apple
Web
Android
iOS
Signing in users with Facebook
Web
iOS
Signing in users with GitHub
Signing in users with Google
Signing in users with Microsoft
Signing in users with Twitter
Signing in users with OIDC
Signing in users with SAML
Signing in users with a custom authentication system
Signing in users from a Chrome extension
Showing a custom domain during sign in
Reauthenticating users
Signing in users with SMS
Phone number
Registering test phone numbers
Best practices for signInWithRedirect flows
Adding multi-factor authentication
Adding multi-factor authentication to your web app
Adding multi-factor authentication to your iOS app
Adding multi-factor authentication to your Android app
Enable TOTP MFA for your app
Working with multi-factor users
Managing multi-factor users programmatically
Customizing authentication with Cloud Functions
Asynchronous functions
Blocking functions
Working with users
Linking multiple providers to an account
Configure custom claims on users
Using the REST API
Managing users and providers
