AppleAuthService.swift

@available(iOS 13.0, *)
class AppleAuthService: NSObject, AuthService {
    private weak var viewController: UIViewController?
    private weak var delegate: AuthServiceDelegate?
    private var backendAuth: ServiceAuthorizer?
    var authType: PreferredAuthMethod = .apple

    init(_ viewController: UIViewController?, delegate: AuthServiceDelegate?) {
        self.viewController = viewController
        self.delegate = delegate
        self.backendAuth = BackendAuthorizer(delegate: delegate)
    }

    func authenticate() {
        let appleIDProvider = ASAuthorizationAppleIDProvider()
        let request = appleIDProvider.createRequest()
        request.requestedScopes = [.fullName, .email]
        
        let authorizationController = ASAuthorizationController(authorizationRequests: [request])
        authorizationController.delegate = self
        authorizationController.presentationContextProvider = self
        authorizationController.performRequests()
    }

    func deAuthenticate() {
        // no sign out on apple method.
    }
}