Laravel Doorkeeper

<?php
namespace App;

use Artisanry\Doorkeeper\Traits\Doorkeeper;
use Artisanry\Doorkeeper\Contracts\DoorkeeperContract;

class User extends Model implements DoorkeeperContract
{
    use Doorkeeper;


    public $limits = [
        'posts' => 5,
        'files' => 10,
    ];

    public function posts() {
        return $this->hasMany('App\Post');
    }

    public function files() {
        return $this->hasMany('App\File');
    }
}

<?php
namespace App\Http\Middleware;

use Closure;
use Illuminate\Support\Facades\Auth;

class ReachedLimits
{

    public function handle($request, Closure $next)
    {
        $user = Auth::check();

        if ( $user->limits($user->subscription->limits)->fails() ) {
            return redirect()->route('billing');
        }

        return $next($request);
    }
}

<?php
namespace App\Http\Controllers;

class DashboardController
{

    public function __construct()
    {
        $this->middleware('reachedLimits');
    }


    public function index()
    {
        return view('dashboard');
    }
}

$user->limits($user->subscription->limits)->passes();
$user->limits($user->subscription->limits)->fails();

$user->passes();

$user->fails();

$user->allowed();

$user->allowed('posts');

$user->current();

$user->current('posts');

$user->maxed();

$user->maxed('posts');