static void Main(string[] args)
        {
            var repository = new Repository(true);

            repository.AddUser(new User()
            {
                Username = "******",
                Name = "John Smith",
                Email = "*****@*****.**"
            });
            repository.AddUser(new User()
            {
                Username = "******",
                Name = "Jane Doe",
                Email = "*****@*****.**"
            });

            var users = repository.GetUsers();
            users.ForEach(u => Console.WriteLine("UserID: {0}", u.UserID));
            Console.WriteLine("Number of Users: {0}", users.Count);

            Console.WriteLine("Press Enter to continue");
            Console.Read();
        }
 // TODO add constructor that accepts a IRepository interface
 public UsersController()
 {
     _repository = new Repository();
 }