如何在laravel中使用用户时区？

$userTimezone = Auth::user()->timezone;

$userTimezone = Auth::user()->timezone;
$now = Carbon::now($userTimezone);

namespace App\Http\Middleware;

use Closure;
use Auth;
use Config;

class UserTimezoneMiddleware
{
    public function handle($request, Closure $next)
    {
        if (Auth::check()) {
            $userTimezone = Auth::user()->timezone;
            Config::set('app.timezone', $userTimezone);
        }

        return $next($request);
    }
}

protected $middlewareGroups = [
    'web' => [
        // ...
        \App\Http\Middleware\UserTimezoneMiddleware::class,
    ],
    // ...
];