Laravel-Backpack / CRUD

src/app/Http/Controllers/Auth/LoginController.php

<?php

namespace Backpack\CRUD\app\Http\Controllers\Auth;

use Backpack\CRUD\app\Library\Auth\AuthenticatesUsers;
use Illuminate\Http\Request;
use Illuminate\Routing\Controller;

class LoginController extends Controller
{
    protected ?string $loginPath = null;
    protected ?string $redirectTo = null;
    protected ?string $redirectAfterLogout = null;

    protected $data = []; // the information we send to the view

    /*
    |--------------------------------------------------------------------------
    | Login Controller
    |--------------------------------------------------------------------------
    |
    | This controller handles authenticating users for the application and
    | redirecting them to your home screen. The controller uses a trait
    | to conveniently provide its functionality to your applications.
    |
    */
    use AuthenticatesUsers {

The trait Backpack\CRUD\app\Library\Auth\AuthenticatesUsers requires some properties which are not provided by Backpack\CRUD\app\Http\Controllers\Auth\LoginController: $maxAttempts, $email_verified_at, $decayMinutes

        logout as defaultLogout;
    }

    /**
     * Create a new controller instance.
     *
     * @return void
     */
    public function __construct()
    {
        $guard = backpack_guard_name();

        $this->middleware("guest:$guard", ['except' => 'logout']);

        // ----------------------------------
        // Use the admin prefix in all routes
        // ----------------------------------

        // If not logged in redirect here.
        $this->loginPath ??= backpack_url('login');

        // Redirect here after successful login.
        $this->redirectTo ??= backpack_url('dashboard');

        // Redirect here after logout.
        $this->redirectAfterLogout ??= backpack_url('login');
    }

    /**
     * Return custom username for authentication.
     *
     * @return string
     */
    public function username()
    {
        return backpack_authentication_column();
    }

    /**
     * The user has logged out of the application.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return mixed
     */
    protected function loggedOut(Request $request)

The parameter $request is not used and could be removed.

    {
        return redirect($this->redirectAfterLogout);
    }

    /**
     * Get the guard to be used during logout.
     *
     * @return \Illuminate\Contracts\Auth\StatefulGuard
     */
    protected function guard()
    {
        return backpack_auth();
    }
}