Project PR

With regards to my [comment] (https://github.com/jcoconut/dietcake/pull/2/files#r18013476) here, you can change L93 ~ 95 as follows : 
```php
$klub = Klub::get(Param::get('klub_id'));
$deleted = $klub->deleteKlub();
```
since the get() method returns a new instance of itself, the attribute klub_id is preserved in it which removes the need to initialize this attribute unlike in L94.