The getter 'uid' not defined - firebase

Question

i'm trying to create a food track app on android studio, it's my first time and i'm working with firebase_auth 3.3.12. my code in the aut.dart is:
import 'package:firebase_auth/firebase_auth.dart';
import 'package:my_firstapp/models/user_model.dart';
class AuthService {
final FirebaseAuth _auth = FirebaseAuth.instance;
AuthService();
// create user object based on FirebaseUser.
UserModel _userFromUser(User) {
return user != null ? UserModel(uid: user.uid) : null;
}
// auth change user stream
Stream<UserModel> get user {
return _auth.authStateChanges()
.map(_userFromUser);
}
Future<UserModel> getUser() async {
User user = await _auth.currentUser();
return _userFromUser(user);
}
// sign in with email and password
Future signInWithEmailAndPassword(String email, String password) async {
try {
UserCredential result = await _auth.signInWithEmailAndPassword(email: email, password: password);
User user = result.user;
return _userFromUser(user);
} catch(e) {
print(e.toString());
return null;
}
}
// sign up with email and password
Future registerWithEmailAndPassword(String email, String password) async {
try {
UserCredential result = await _auth.createUserWithEmailAndPassword(email: email, password: password);
User user = result.user;
// create a new user document in database
return _userFromUser(user);
} catch(e) {
print(e.toString());
return null;
}
}
// sign out
Future signOut() async {
try {
return await _auth.signOut();
} catch(e){
print(e.toString());
return null;
}
}
}
However i'm getting 2 errors:
-The getter 'uid' isn't defined for the type 'Stream';
-The expression "await _auth.currentUser()" doesn't evaluate to a function, so it can't be invoked.
How can i rewrite the code? thanks

Answer 1

The _auth.currentUser is not a function (it used to be, but changed about a year ago), but rather a property. It also isn't asynchronous, so you don't need await nor to return a Future.
So:
UserModel getUser() {
User user = _auth.currentUser;
return _userFromUser(user);
}

Answer 2

In this code, your argument is capitalised ('User') but in the code block you write 'user'.
UserModel _userFromUser(User) {
return user != null ? UserModel(uid: user.uid) : null;
}
Furthermore, for _auth.currentUser(), you do not need to use await as it does not return a future.