text: 
  import 'package:flutter/material.dart';
  import 'package:flutter_deer/shop/models/user_entity.dart';
  
  class UserProvider extends ChangeNotifier {
  
    UserEntity _user;
    UserEntity get user => _user;
    
    void setUser(UserEntity user) {
      _user = user;
      notifyListeners();
    }
  }