【Swift】iOSアプリでWeb認証画面を実装する方法まとめ - Qiita
はじめにこんばんは。iOS開発経験4ヶ月の初心者です🔰。「iOS開発未経験」、「そもそも認証とは?」な有様なので、iOSのWeb認証(OpenID Connect)の実装に苦悩しています。本稿…
Qiita@mattwilcox @MonaApp @ljunge I think
@ivory uses the same style, I think it’s what’s described in
https://developer.apple.com/documentation/authenticationservices/authenticating_a_user_through_a_web_service, the
#ASWebAuthenticationSession, and probably extra special in MacOS Catalyst apps that share most of the code with their iOS app equivalents (as eg
@ivory does)

Authenticating a User Through a Web Service | Apple Developer Documentation
Use a web authentication session to authenticate a user in your app.
Apple Developer Documentation