issues with database.dart cant user List data in stream

[refat47]

import 'package:cloud_firestore/cloud_firestore.dart'; import 'package:flutter/material.dart'; import 'package:googletestconnection/models/userData.dart';

class DatabaseService{

final String uid; DatabaseService ({this.uid}); //collection Refferences

final CollectionReference userDataCollection = FirebaseFirestore.instance.collection('userData');

Future updateUserData(String sugars, String name, int strength) async { return await userDataCollection.doc(uid).set({ 'sugars': sugars, 'name': name, 'strength': strength, }); } //User data collection List _userDataListFromSnapshot(QueryDocumentSnapshot snapshot) { return snapshot.get('doc').map((doc) { return UserDataList( name: doc.data['name'] ?? '', strength: doc.data['strength'] ?? 0, sugars: doc.data['sugars'] ?? '0' );

});

} //get user profile data

Stream<QueryDocumentSnapshot<List>> get userData { return userDataCollection.snapshots() .map(_userDataListFromSnapshot); } }

lib/screens/home/home.dart:16:32: Error: The argument type 'Stream<QueryDocumentSnapshot<List>>' can't be assigned to the parameter type 'Stream<QuerySnapshot