建立model層名稱為   Admin.php  內容為

<?php
namespace App\Models;
use Illuminate\Database\Eloquent\Model;
use Cartalyst\Sentinel\Users\EloquentUser;
use Illuminate\Foundation\Auth\User as Authenticatable;
class Admin extends Authenticatable
{
//
}

命令執行        php artisan make:auth

在app/Http/Kernel.php  中  刪除

\App\Http\Middleware\TrustProxies::class,

在 $routeMiddleware組中新增  'admin'=> \App\Http\Middleware\Admin::class,

在app/config中的auth.php中 新增

guards 組中新增 

'admin'=>[
'driver'=>'session',
'provider'=>'admin',
],

providers 組中新增

'admin'=>[
'driver'=>'eloquent'
 
,
'model' => App\Models\Admin::class,
],

在app/Http/Middleware中 新建  Admin.php 內容為

<?phpnamespace App\Http\Middleware;
use Illuminate\Support\Facades\Auth;
use Closure;
class Admin
{
public function handle($request, Closure $next)
    {
if (Auth::guard('admin')->check()) {
// The user is logged in...
 
return $next($request);
        }else{
return redirect('Admin/Login');
        }
}
}

控制器內容為

<?php
namespace App\Http\Controllers\Admin;
use Illuminate\Http\Request;
use App\Http\Controllers\Controller;
use Illuminate\Support\Facades\Auth;
class LoginController extends Controller
{public function postLogin(Request $request)
    {
$name = $request->get('name'); //  使用者名稱
$password = $request->get('password');
if (empty($name) && empty($password)) return back()->with(['msg'=>'使用者名稱和密碼不能為空！']);
$arr = [
'name' => $name,
'password' => $password
];
if (Auth::guard('admin')->attempt($arr)){
return redirect()->action('後臺首頁地址');
        }else{
return redirect('登入地址')->with(['msg'=>'使用者名稱或密碼不正確!']);
        }
    }
}