class User {
    private id, fname, lname, username, email;
    public Boolean User(Int uid [, Array settings]);
    public Array getData();
}
class FindUser {
    public User findByUsername();
    public User findByEmail();
    // etc...
}
class UserAuthorization {
    public User login(String username, String password);
    public User checkLogin();
    public Boolean logout();
}
class UserAlteration {
    public Boolean UserAlteration(User user);
    public Boolean createUser();
    public Boolean setPassword(String password);
    public Boolean setName(String name);
    // etc...
}