First Pull request for code review - Registration, User Log in, Pagination

ah. it's just that in `UserController` you already set it po before you called the `authenticate` method
```php
$user->username = Param::get('username');
$user->password = sha1(Param::get('password')); 
```
so I think you do not have to pass it as parameter :smile:
because `$this->username` and  `$this->password` already contains the data you need po :bow: