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# ASAuthorizationProviderExtensionRegistrationHandler

An interface through which a single sign-on (SSO) authentication provider extension registers users and devices for platform SSO.

```
protocol ASAuthorizationProviderExtensionRegistrationHandler : NSObjectProtocol
```

## Topics

### Registering users and devices

[`beginDeviceRegistration(loginManager:options:completion:)`](/documentation/AuthenticationServices/ASAuthorizationProviderExtensionRegistrationHandler/beginDeviceRegistration(loginManager:options:completion:))

Initiates the device registration process for the single sign-on extension.

[`beginUserRegistration(loginManager:userName:method:options:completion:)`](/documentation/AuthenticationServices/ASAuthorizationProviderExtensionRegistrationHandler/beginUserRegistration(loginManager:userName:method:options:completion:))

Initiates the user registration process for the user and the single sign-on extension.

[`registrationDidComplete()`](/documentation/AuthenticationServices/ASAuthorizationProviderExtensionRegistrationHandler/registrationDidComplete())

Calls the extension to allow it to complete registration.

### Instance Methods

[`protocolVersion()`](/documentation/AuthenticationServices/ASAuthorizationProviderExtensionRegistrationHandler/protocolVersion())

[`registrationDidCancel()`](/documentation/AuthenticationServices/ASAuthorizationProviderExtensionRegistrationHandler/registrationDidCancel())

[`supportedGrantTypes()`](/documentation/AuthenticationServices/ASAuthorizationProviderExtensionRegistrationHandler/supportedGrantTypes())


---

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