UNIT3D-Community-Edition/app/Http/Controllers/User/TopicController.php

<?php
/**
 * NOTICE OF LICENSE.
 *
 * UNIT3D Community Edition is open-sourced software licensed under the GNU Affero General Public License v3.0
 * The details is bundled with this project in the file LICENSE.txt.
 *
 * @project    UNIT3D Community Edition
 *
 * @author     Roardom <roardom@protonmail.com>
 * @license    https://www.gnu.org/licenses/agpl-3.0.en.html/ GNU Affero General Public License v3.0
 */

namespace App\Http\Controllers\User;

use App\Http\Controllers\Controller;
use App\Models\User;

class TopicController extends Controller
{
    /**
     * Show user topics.
     */
    public function index(string $username): \Illuminate\Contracts\View\Factory|\Illuminate\View\View
    {
        $user = User::where('username', '=', $username)->sole();
        $topics = $user->topics()->latest()->paginate(25);

        return \view('user.topic.index', [
            'topics' => $topics,
            'user'   => $user,
        ]);
    }
}