Capacitor Firebase Sign in with Apple

1. 在 Firebase Console > Authentication, 启动 Sign in with Apple. 记下 Firebase 提供的 callback URL.
2. 在 Apple Developer > Certificates, Identifiers & Profiles 找到当前应用. 增加 Sign in with Apple 能力, 同时填入之前之前步骤记下的 callback URL.
3. 在 Xcode 中增加 Capability > Sign in with Apple
4. 增加 Sign in with Apple 相关的代码

   // src/stores/auth.ts
   import { FirebaseAuthentication } from '@capacitor-firebase/authentication'
   
   const signInWithApple = async (): Promise<User | null> => {
      try {
         const { user } = await FirebaseAuthentication.signInWithApple()
         console.log('[signInWithApple] success, uid = ', user?.uid)
         currentUser.value = user
         return user
      }
      catch (error) {
         console.log('[signInWithApple] error ', JSON.stringify(error, null, 2))
         return null
      }
   }

5. 如果整合是成功的, 点下苹果登录的按钮后, 一个描述为 "Create an account for APP_NAME using your Apple ID YOUR_APPLE_ID" 的对话框会弹出