How to use the expo-in-app-purchases.getProductsAsync function in expo-in-app-purchases

/*
      These item entries are created in App Store Connect and Google Play Console respectively.
      If you want to add more or edit their attributes you can do so there.
    */
    const items = Platform.select({
      ios: [
        'dev.expo.products.premium',
        'dev.expo.payments.updates',
        'dev.expo.payments.adfree',
        'dev.expo.payments.gold',
      ],
      android: ['gas', 'premium', 'gold_yearly', 'gold_monthly'],
    });

    // Get product details
    const { responseCode, results } = await getProductsAsync(items);
    if (responseCode === IAPResponseCode.OK) {
      this.setState({ items: results, history: history.results });
    }

    // Set purchase listener
    setPurchaseListener(({ responseCode, results, errorCode }) => {
      if (responseCode === IAPResponseCode.OK) {
        for (const purchase of results) {
          console.log(`Successfully purchased ${purchase.productId}`);
          if (!purchase.acknowledged) {
            finishTransactionAsync(purchase, true);
          }
        }
      } else if (responseCode === IAPResponseCode.USER_CANCELED) {
        console.log('User canceled');
      } else {