Authorization Controller Implementation for Error and success handling callbacks

AuthorizationController.swift

func authorizationController(controller: ASAuthorizationController, didCompleteWithAuthorization authorization: ASAuthorization) {
  let logger = Logger()
  switch authorization.credential {
  case let credentialRegistration as ASAuthorizationPlatformPublicKeyCredentialRegistration:
      logger.log("A new passkey was registered: \(credentialRegistration)")
      // Verify the attestationObject and clientDataJSON with your service.
      // The attestationObject contains the user's new public key to store and use for subsequent sign-ins.
      // let attestationObject = credentialRegistration.rawAttestationObject
      // let clientDataJSON = credentialRegistration.rawClientDataJSON

      // After the server verifies the registration and creates the user account, sign in the user with the new account.
      didFinishSignIn()
  case let credentialAssertion as ASAuthorizationPlatformPublicKeyCredentialAssertion:
      logger.log("A passkey was used to sign in: \(credentialAssertion)")
      // Verify the below signature and clientDataJSON with your service for the given userID.
      // let signature = credentialAssertion.signature
      // let clientDataJSON = credentialAssertion.rawClientDataJSON
      // let userID = credentialAssertion.userID

      // After the server verifies the assertion, sign in the user.
      didFinishSignIn()
  case let passwordCredential as ASPasswordCredential:
      logger.log("A password was provided: \(passwordCredential)")
      // Verify the userName and password with your service.
      // let userName = passwordCredential.user
      // let password = passwordCredential.password

      // After the server verifies the userName and password, sign in the user.
      didFinishSignIn()
  default:
      fatalError("Received unknown authorization type.")
  }

  isPerformingModalReqest = false
}

func authorizationController(controller: ASAuthorizationController, didCompleteWithError error: Error) {
  let logger = Logger()
  guard let authorizationError = error as? ASAuthorizationError else {
      isPerformingModalReqest = false
      logger.error("Unexpected authorization error: \(error.localizedDescription)")
      return
  }

  if authorizationError.code == .canceled {
      // Either the system doesn't find any credentials and the request ends silently, or the user cancels the request.
      // This is a good time to show a traditional login form, or ask the user to create an account.
      logger.log("Request canceled.")

      if isPerformingModalReqest {
          didCancelModalSheet()
      }
  } else {
      // Another ASAuthorization error.
      // Note: The userInfo dictionary contains useful information.
      logger.error("Error: \((error as NSError).userInfo)")
  }

  isPerformingModalReqest = false
}