source: app/Http/Middleware/UserRole.php@ dfae77e

<?php

namespace App\Http\Middleware;

use App\Providers\RouteServiceProvider;
use Closure;
use Illuminate\Contracts\Foundation\Application;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\Routing\Redirector;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\Storage;

class UserRole
{
    /**
     * Handle an incoming request.
     *
     * @param Request $request
     * @param  \Closure(\Illuminate\Http\Request): (\Illuminate\Http\Response|\Illuminate\Http\RedirectResponse)  $next
     * @return Application|JsonResponse|RedirectResponse|Redirector
     */
    public function handle(Request $request, Closure $next, ...$roles)
    {
        if ($request->expectsJson()) {
            return response()->json(['error' => 'Unauthenticated.'], 401);
        }

        if (!Auth::check()) {
            return redirect(RouteServiceProvider::HOME);
        }

        if (in_array(strtolower(Auth::user()->type), $roles)) {
            return $next($request);
        }

        return redirect('/login');
    }
}