public List<User> GetUsers()
        {
            UsersList userList = new UsersList();

            if (userList.DeserializeUsers())
            {
                return userList.Users;
            }
            else
            {
                return new List<User>();
            }
        }
 public bool SetUsers(IEnumerable<User> users)
 {
     UsersList usersList = new UsersList(users);
     return usersList.SerializeUsers();
 }