Using a provider in a custom class flutter - flutter

Question

I am creating a program that needs to use Provider to get values. I call my provider like below in a stateful widget
final user = Provider.of<Users>(context);
Now I would like to use the provider in a custom class
class UserInformation {
final user = Provider.of<Users>(context):
}
This won't work because context is not defined. kindly assist on how I can do this without using a BuildContext.
This is my class Users that I have on a separate dart file and use as a model for for my data streams.
class Users {
final String uid;
final String name;
final String department;
final String position;
Users({ this.uid, this.department, this.name, this.position });
}
This is the query I use to pull data from firestore
Stream<List<FormQuestions>> get userData{
return userCollection.where('name', isEqualTo: 'First Name').where('department', isEqualTo: 'department').snapshots()
.map(_userDataFromSnapshot);
}
I would like the name to be a variable that I get from say (user.name) from the model class. and the same for the department.
Thanks.

Answer 1

You can only access classes which are ChangeNotifiers in the descendant widgets in the tree below this provided ChangeNotifier because behind the scenes the Provider uses InheritedWidget (which uses context) to provide you with the ChangeNotifier you put up in the tree
So in your case there is no way to access the Users from UserInformation and you have to alter your code to make a workaround
Edit: this is a suggestion to achieve what you want if you are using this code inside a widget:
class UserInformation{
final User user;
UserInformation(this.user);
}
class SomeWidget extends StatefulWidget {
#override
_SomeWidgetState createState() => _SomeWidgetState();
}
class _SomeWidgetState extends State<SomeWidget> {
void someMethod(){
final User user = Provider.of<Users>(context);
UserInformation userInformation = UserInformation(user);
//do something
}
#override
Widget build(BuildContext context) {
return Container();
}
}

Answer 2

¡Hey! In the class you need to add "with ChangeNotifier":
class Users with ChangeNotifier {
final String uid;
final String name;
final String department;
final String position;
Users({ this.uid, this.department, this.name, this.position });
}
Hope help. Sorry for the english, yo hablo español. :D