composer require laravel/ui

php artisan ui bootstrap --auth

npm install

npm run build

// เส้นทางไฟล์ Layout หลักของระบบ Authentication
resources/
└── views/
    └── layouts/
        └── app.blade.php   ⭐ (Master Layout ของระบบ Auth)

<!-- resources/views/layouts/app.blade.php -->
<title>@yield('title')</title>

<!-- resources/views/layouts/app.blade.php -->
<!-- Right Side Of Navbar -->
<ul class="navbar-nav ms-auto">
    <!-- Authentication Links -->
    @guest
        @if (Route::has('login'))
            <li class="nav-item">
                <a class="nav-link" href="{{ route('login') }}">เข้าสู่ระบบ</a>
            </li>
        @endif

        @if (Route::has('register'))
            <li class="nav-item">
                <a class="nav-link" href="{{ route('register') }}">สมัครเป็นนักเขียน</a>
            </li>
        @endif
    ...
</ul>

<!-- resources/views/layouts/app.blade.php -->
@else
    <li class="nav-item dropdown">
        <a id="navbarDropdown" class="nav-link dropdown-toggle" href="#" role="button">
            สวัสดี , {{ Auth::user()->name }}
        </a>

        <div class="dropdown-menu dropdown-menu-end" aria-labelledby="navbarDropdown">
            <a class="dropdown-item" href="{{ route('logout') }}"
               onclick="event.preventDefault();
                             document.getElementById('logout-form').submit();">
                ออกจากระบบ
            </a>

            <form id="logout-form" action="{{ route('logout') }}" method="POST" class="d-none">
                @csrf
            </form>
        </div>
    </li>
@endguest

<!-- resources/views/layouts/app.blade.php -->
<div class="dropdown-menu dropdown-menu-end" aria-labelledby="navbarDropdown">
    <a class="dropdown-item" href="/create">เขียนบทความ</a>
    <a class="dropdown-item" href="/blog">บทความของฉัน</a>
    <a class="dropdown-item" href="{{ route('logout') }}"
       onclick="event.preventDefault();
                     document.getElementById('logout-form').submit();">
        ออกจากระบบ
    </a>

    <form id="logout-form" action="{{ route('logout') }}" method="POST" class="d-none">
        @csrf
    </form>
</div>

<!-- resources/views/blog.blade.php -->
@extends('layouts.app')

// app/Http/Controllers/HomeController.php
public function __construct()
{
    $this->middleware('auth');
}

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

// app/Http/Controllers/AdminController.php
public function __construct()
{
    $this->middleware('auth');
}

// app/Http/Controllers/AdminController.php
public function __construct()
{
    $this->middleware('auth');
}