FirebaseAuth.instance is null - firebase

Question

Hey I'm new to flutter development and I got this message when trying to do SignUp to Firebase
I/flutter (23432): NoSuchMethodError: The method 'createUserWithEmailAndPassword' was called on null.
I/flutter (23432): Receiver: null
And here is the code
AuthServide.dart
class AuthServices {
static FirebaseAuth _auth = FirebaseAuth.instance;
static Future<SignInSignUpResult> signUp(String email, String password,
String name, List<String> selectedGenres, String selectedLanguage) async {
try {
log(_auth.toString());
log("Proses Sign Up");
UserCredential result = await _auth.createUserWithEmailAndPassword(
email: email, password: password);
log("Selesai Sign Up");
log(result.toString());
Users user = result.user.convertToUser(
name: name,
selectedGenres: selectedGenres,
selectedLanguage: selectedLanguage);
await UserServices.updateUser(user);
return SignInSignUpResult(user: user);
} catch (e) {
return SignInSignUpResult(message: e.toString());
}
}
}
After I check the log I know that FirebaseAuth.instance is null, but why?
I'm currently following a tutorial on an online flutter class and I got stuck here.
Anybody can help me?
Thanks

Answer 1

You can try this. I think it will work for you. Make sure you added the firebase auth pakage firebase_auth: ^0.18.4+1
import 'package:firebase_auth/firebase_auth.dart';
class AuthMethods {
// CONDITION ? TRUE: FLASE
User _userFromFirebaseUser(FirebaseUser user) {
return user != null ? User(userId: user.uid) : null;
}
Future signInWithEmailAndPassword(String email, String password) async {
try {
AuthResult result = await _auth.signInWithEmailAndPassword(
email: email, password: password);
FirebaseUser firebaseUser = result.user;
return _userFromFirebaseUser(firebaseUser);
} catch (e) {
print(e.toString());
}
}
try {
AuthResult result = await _auth.createUserWithEmailAndPassword(
email: email, password: password);
FirebaseUser firebaseUser = result.user;
return _userFromFirebaseUser(firebaseUser);
} catch (e) {
print(e.toString());
}
}
Future resetPass(String email) async {
try {
return await _auth.sendPasswordResetEmail(email: email);
} catch (e) {
print(e.toString());
}
}
Future signOut() async {
try {
return await _auth.signOut();
} catch (e) {}
}
}