public function postAddPhotos(Request $request)
    {
        if (!$request->hasFile('photos')) {
            return response('', 400);
        }

        foreach ($request->file('photos') as $file) {
            $photo = Photo::upload($file->getRealPath());

            session()->push('photos', [
                'photo_id' => $photo->getKey(),
                'filename' => $file->getClientOriginalName(),
            ]);
        }
    }