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我正在尝试将Flutter应用与Firebase连接。我按照他们的教程进行了更改，并仔细检查了应用级别和项目级别的build.gradle文件。启用Firestore并创建了一个集合。我将google_services.json文件放在android/app目录中。一切正常。它甚至没有抛出错误。但Firebase控制台没有显示任何更新。以下是我编写的主要.dart文件。

import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:firebase_core/firebase_core.dart';
import 'package:flutter/material.dart';
import 'package:cake_of_the_day/login.dart';
import 'package:cake_of_the_day/catalogue.dart';
import 'package:cake_of_the_day/cart.dart';

Future<void> main() async {

  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp();

  CollectionReference cakes = FirebaseFirestore.instance.collection('cakes');

  cakes.add({'name':'asdasd', 'age':21}).then((value) => print("done")).catchError((error) {print(error);});

  runApp(
    MaterialApp(
      title: 'Named Routes Demo',
      // Start the app with the "/" named route. In this case, the app starts
      // on the FirstScreen widget.
      initialRoute: '/',
      routes: {
        // When navigating to the "/" route, build the FirstScreen widget.
        '/': (context) => const LoginScreen(),
        // When navigating to the "/second" route, build the SecondScreen widget.
        '/catalogue': (context) => const Catalogue(),
        '/cart' : (context) => const Cart()
      },
    ),
  );
}