未定义Laravel 8路由登录

Route::post('/login', 'Auth\LoginController@login')->name('login');

php artisan make:controller Auth\LoginController

namespace App\Http\Controllers\Auth;

use Illuminate\Http\Request;
use App\Http\Controllers\Controller;
use Illuminate\Support\Facades\Auth;

class LoginController extends Controller
{
    public function login(Request $request)
    {
        $credentials = $request->only('email', 'password');

        if (Auth::attempt($credentials)) {
            // 登录成功
            return redirect()->intended('/dashboard');
        }

        // 登录失败
        return back()->withErrors([
            'email' => 'Invalid credentials',
        ]);
    }
}

<form method="POST" action="{{ route('login') }}">
    @csrf

    <div>
        <label for="email">Email</label>
        <input id="email" type="email" name="email" required autofocus>
    </div>

    <div>
        <label for="password">Password</label>
        <input id="password" type="password" name="password" required>
    </div>

    <div>
        <button type="submit">Login</button>
    </div>
</form>