function User(name, email){
                this.name = name;
                this.email = email;
            }

            User.prototype.login = function(date){
                this.date = date;
                console.log(`${this.email} logged on ${this.date}`);
            }

            function Admin(name, email, rank){
                User.call(this, name, email);
                this.rank = rank;
                this.givePrivilige = function(privilige){
                    console.log(`${this.email} has privilige ${privilige}`);
                }
            }
            Admin.prototype = Object.create(User.prototype);


            const user = new User("john", "john@gmail.com");
            console.log(user.name);
            user.login("2020-12-01");

            const admin = new Admin("jane", "jane@gmail.com", "site-admin");
            admin.login("2020-12-01");
            admin.givePrivilige("deleteUsers");