Why can't I get the request attributes back in laravel controller contructor?

I am trying to get the authenticated user in the constuctor of my controller in laravel by doing dd(auth()->user()); and it says null. I even added the user id into a request attribute in one of my middleware like so:

$request->attributes->add(['auth_user_id' => $user_id]);

Even if I do dd($request->get('auth_user_id') in my controller's construct method, I get null. But when I do the same thing in a test route, Both die dump statements work well and give me back the user or the user id, whichever I ask for.

Why am I not able to get these in the construct method of my controller tho? I am even able to get the same user id and auth user in my controller method to which the request goes to. Just not the construct method. What am I missing?

via Chebli Mohamed