Android Studio – (Flutter) Error: The argument type 'String?' can't be assigned to the parameter type 'String' because 'String?' is nullable and 'String' isn't
im using flutter in android studio. coding as below. class _loginscreenState extends State<loginscreen> { GlobalKey<FormState> formKey = GlobalKey<FormState>(); String? _email, _password; void signin() async { await FirebaseAuth.instance .signInWithEmailAndPassword(email: _email, password: _password) .catchError((onError) { print(onError); }).then((authUser) => {print(authUser.user?.uid)}); } please help…