Share data with all views in Laravel?

Question

I'm trying to share a collection of notifications to all views under the auth middleware. I thought I might be able to just call Auth::check() but it seems to always return false?

<?php

namespace App\Providers;

use Illuminate\Http\Request;
use Illuminate\Support\ServiceProvider;
use Auth;

class ViewServiceProvider extends ServiceProvider
{
    /**
     * Bootstrap the application services.
     * @return void
     */
    public function boot()
    {
        view()->composer('*', function ($view)
        {
            $view->with('userNotifications', Auth::user()->notifications);
        });
    }
}