auth-flow

You can implement Sign in with Apple and biometric login by integrating the AuthenticationServices and LocalAuthentication APIs. This approach handles multi-method authentication and establishes secure user sessions directly within your SwiftUI application.

The best way to manage secure session persistence is by storing encrypted credentials in the Keychain. Utilizing Keychain APIs ensures that user session data remains encrypted and persistent across app launches while meeting modern security standards.

Keychain storage works by encrypting and saving user authentication credentials locally on the device. It integrates with AuthenticationServices to securely persist sensitive data like tokens from Sign in with Apple, preventing unauthorized access.

Yes, you can use Face ID and Touch ID alongside Sign in with Apple. By combining the LocalAuthentication and AuthenticationServices APIs, the system supports multi-method authentication to streamline access and enhance security.

No external libraries are needed to build a secure authentication flow. You can generate the entire infrastructure using native Apple frameworks, specifically AuthenticationServices, LocalAuthentication, and Keychain APIs for credential handling.

You should use Keychain over UserDefaults because Keychain provides encrypted storage for sensitive session data. While UserDefaults stores data in plain text, Keychain APIs integrate with biometric login to protect credentials and meet strict security requirements.