Use Apple FaceID or TouchID authentication in your app using BiometricAuthentication.

Apple bio metric authentication for touchID and faceID

TSQBiometricAuth is a lib to enable biometric authentication via simple ViewController usage.

Integrating Face ID Login Page UI With Firebase Authentication Using SwiftUI - SwiftUI 2.

Face ID and Touch ID authentication using LocalAuthentication framework - Swift 4.2, iOS 11+

KSDeviceAuthentication provides wrapper around LocalAuthentication.framework for authentication device using touchId , faceId and passcode.

Face/Touch ID