FirebaseAnimatedList problem

import 'package:firebase_auth/firebase_auth.dart';
import 'package:firebase_core/firebase_core.dart';
import 'package:firebase_database/firebase_database.dart';
import 'package:firebase_database/ui/firebase_animated_list.dart';
import 'package:flutter/material.dart';
import 'firebase_options.dart';

void main() {
  runApp( MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  Future<UserCredential> _signIn() async {
    print('init app');
    return Firebase.initializeApp(
      options: DefaultFirebaseOptions.currentPlatform,
    ).then((value) async {
      print('signing in');
      return await FirebaseAuth.instance.signInWithEmailAndPassword(
        email: "[email protected]",
        password: "mypassword",
      );
    });
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      home: FutureBuilder<UserCredential>(
        future: _signIn(),
        builder: (context, snapshot) {
          if (snapshot.connectionState == ConnectionState.waiting) {
            return const Scaffold(
              body: Center(
                child: CircularProgressIndicator(),
              ),
            );
          } else if (snapshot.hasError) {
            return Scaffold(
              body: Center(
                child: Text("Error signing in: ${snapshot.error}"),
              ),
            );
          } else {
            return const StateHome();
          }
        },
      ),
    );
  }
}

class StateHome extends StatefulWidget {
  const StateHome({Key? key}) : super(key: key);

  @override
  State<StateHome> createState() => _StateHomeState();
}

class _StateHomeState extends State<StateHome> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          title: const Text("Home"),
          actions: [
            IconButton(
              icon: const Icon(Icons.logout),
              onPressed: () async {
                FirebaseAuth.instance.signOut().then((value) => print('logged out'));
              },
            )
          ],
        ),
        body: Column(children: [
            Expanded(
              child: FirebaseAnimatedList(
                  query: FirebaseDatabase.instance.ref().child('msg'),
                  itemBuilder: (BuildContext context, DataSnapshot snapshot,
                      Animation<double> animation, int index) {
                      return ListTile(
                        title: Text("message.content"),
                      );
                  }),
            ),

        ]
        )
    );
  }
}