当我从 Flutter 应用程序中的开发人员控制台获得有效的客户端 ID 时，如何使用 Google 登录 Package 获取有效的服务器身份验证令牌？

Question

I am trying to get the server auth token which needs to be sent to the backend so that they can pull the data from Google Fit API but they need this token after a user allows some scopes from the Android app. My firebase and google cloud project is one for which I am using google-services.json file. I have generated Client ID from Google API Console which is also present in google-services.json . After doing all of that I am still getting server auth token as null. How can I get the correct server auth code?

void connectWithGoogleFit() async {
    final GoogleSignIn googleSignIn = GoogleSignIn(
        clientId:
            '116565654179-8764764.apps.googleusercontent.com',
        scopes: <String>[
          'email',
          'https://www.googleapis.com/auth/fitness.activity.read',
        ]);
    final GoogleSignInAccount googleUser = await googleSignIn.signIn();
    final GoogleSignInAuthentication googleSignInAuthentication =
        await googleUser.authentication;
    String serverAuthToken = googleSignInAuthentication.serverAuthCode;
    print('token');
    print(serverAuthToken);
  }

Answer 1

I am trying to get the server auth token which needs to be sent to the backend so that they can pull the data from Google Fit API but they need this token after a user allows some scopes from the Android app. My firebase and google cloud project is one for which I am using google-services.json file. I have generated Client ID from Google API Console which is also present in google-services.json . After doing all of that I am still getting server auth token as null. How can I get the correct server auth code?

void connectWithGoogleFit() async {
    final GoogleSignIn googleSignIn = GoogleSignIn(
        clientId:
            '116565654179-8764764.apps.googleusercontent.com',
        scopes: <String>[
          'email',
          'https://www.googleapis.com/auth/fitness.activity.read',
        ]);
    final GoogleSignInAccount googleUser = await googleSignIn.signIn();
    final GoogleSignInAuthentication googleSignInAuthentication =
        await googleUser.authentication;
    String serverAuthToken = googleSignInAuthentication.serverAuthCode;
    print('token');
    print(serverAuthToken);
  }