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authentication

Implement iOS authentication with Sign in with Apple, OAuth, and biometrics.

Updated Mar 31, 2026
Search Tags:#authentication#oauth#ios#biometrics#keychain#sign-in-with-apple
One-click install
npx skills add https://github.com/DFly7/iOS-FastAPI-Supabase-AI --skill authentication-dfly7
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: authentication
Source: https://github.com/DFly7/iOS-FastAPI-Supabase-AI/tree/main/.agents/skills/authentication
Command: npx skills add https://github.com/DFly7/iOS-FastAPI-Supabase-AI --skill authentication-dfly7

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

Implement iOS authentication patterns including Sign in with Apple (ASAuthorizationAppleIDProvider, ASAuthorizationController, ASAuthorizationAppleIDCredential), credential state checking, identity token validation, ASWebAuthenticationSession for OAuth and third-party auth flows, ASAuthorizationPasswordProvider for AutoFill credential suggestions, and biometric authentication with LAContext.

Core Features & Use Cases

  • Sign in with Apple, credential state checks, and server-side identity token validation.
  • ASWebAuthenticationSession for OAuth flows and secure redirects.
  • Password AutoFill support via ASAuthorizationPasswordProvider and secure Keychain storage.
  • Biometric authentication with LAContext for re-authentication and credential protection.

Quick Start

Start implementing Sign in with Apple and biometric-based re-authentication in your iOS app.

Frequently Asked Questions about authentication

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I implement Sign in with Apple and handle credential state checks in iOS?▼

iOS biometric re-authentication uses LAContext to prompt Face ID or Touch ID, protecting sensitive credentials and securely gating access to Keychain-backed tokens without requiring users to re-enter passwords.

How does ASWebAuthenticationSession work for OAuth flows in iOS apps?▼

ASWebAuthenticationSession handles OAuth and third-party web authentication flows in iOS by securely opening a browser context, capturing redirect responses, and safely passing authorization tokens back to the app.

Can I use Keychain storage for Password AutoFill and token persistence across app launches?▼

Yes, you can use ASAuthorizationPasswordProvider for AutoFill credential suggestions and securely store persistent identity tokens in the Keychain to maintain authenticated sessions across app launches.

What is the best way to handle revoked credentials and token expiry for iOS authentication?▼

The best way to handle revoked credentials and token expiry during iOS authentication is to continuously monitor credential state, validate identity tokens server-side, and properly clear Keychain storage on revocation.

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