@startuml
title OAuth 2.0/OpenID Connect(Authorization Code Flow)
actor ユーザー as U
participant "ブラウザ" as B
participant "ネイティブアプリ" as C
participant "アプリBFF" as WEB
participant "認証画面" as AWEB
participant "認証/認可サーバ" as AUTH
participant "APIサーバ" as API
