Paywall Flutter question, do we need to

I have a paywall in my new flutter app and it has processed two payments so far, so seems to be workign well. But I noticed a crash in my Android Developers Console and when I went through it I saw this line:

Caused by ga.i0: There is no singleton instance. Make sure you configure Purchases before trying to get the default instance. More info here: https://errors.rev.cat/configuring-sdk

Do we need to configure the purchase beforehand? I would think yes, and maybe I am configurign mine in an odd way which is why its been working. But maybe I need to clean up my code a little. 

I created a revenuecat provider with:

class RevenueCatProvider with ChangeNotifier {
  CustomerInfo? _customerInfo;

  CustomerInfo? get customerInfo => _customerInfo;

  RevenueCatProvider() {
    initPlatformPurchaseStateRevenueCat();
  }

  Future<void> refreshCustomerInfo() async {
    try {
      _customerInfo = await Purchases.getCustomerInfo();
      notifyListeners();
    } on PlatformException catch (e) {
      print("Error refreshing customer info: ${e.message}");
    }
  }

  Future<void> initPlatformPurchaseStateRevenueCat() async {
    //await Purchases.setDebugLogsEnabled(true);
    await Firebase.initializeApp(
      options: DefaultFirebaseOptions.currentPlatform,
    );

    //initialize as google..... this will have to change.
    PurchasesConfiguration configuration;

    if (Platform.isAndroid) {
      configuration =
          PurchasesConfiguration("myCodeAndroid");
      await Purchases.configure(configuration);
      refreshCustomerInfo();
    } else if (Platform.isIOS) {
      configuration =
          PurchasesConfiguration("myCodeApple");
      await Purchases.configure(configuration);
      refreshCustomerInfo();
    }
  }

  bool checkIfPro() {
    return _customerInfo?.entitlements.all['premium']?.isActive ?? false;
  }
}

Then in my settings page in my app I check if the user is Pro or not with:
 

Provider.of<RevenueCatProvider>(context, listen: true).checkIfPro()

If they are pro, I have a button that shows and when clicked executes the paywall:

presentPaywallIfNeeded();

Due to the error I got in the 1 crash, should I actually call this at the begning of my build function in flutter:
 

Provider.of<RevenueCatProvider>(context, listen: true).initPlatformPurchaseStateRevenueCat();