title: Accessing session from TWIG template
body: <p>I've searched a lot on the net how to access the global <code>$_SESSION</code> array from TWIG template and found this: <code>{{app.session.get('index')}}</code>, but when I'm calling it, it returns an empty string. I have a <code>$_SESSION['filter']['accounts']</code> and I'm getting this error when calling <code>{{app.session.get('filter').accounts}}</code>: <code>Item "accounts" for "" does not exist</code>. What I'm doing wrong?</p>