Session and Logger

Pull request had Logger and Writer that write logs in file, but don't have request in code that summon him.
Session - then you go in main page "site.com" if your session have $_SESSION['logInStatus'] = 1 you will see your account page else you will see LogIn page.
isset can trick you
for example
```php
<?php
$array = [
    'key' => null
];

var_dump(isset($a['key']), isset($a['not-exist']));
```
in both cases will be false
BUT the element with key `key` exists and contain `null` as a value