Route [login] not defined

Question

Trying to play with Laravel today for the first time. I am getting the following error when I attempt to visit localhost/project/public:

InvalidArgume

Answer 1

Try to add this at Header of your request: Accept=application/json postman or insomnia add header

Answer 2

Laravel has introduced Named Routes in Laravel 4.2.

WHAT IS NAMED ROUTES?

Named Routes allows you to give names to your router path. Hence using the name we can call the routes in required file.

---

HOW TO CREATE NAMED ROUTES?

Named Routes created in two different way : as and name()

METHOD 1:

Route::get('about',array('as'=>'about-as',function()
    {
            return view('about');
     }
));

METHOD 2:

 Route::get('about',function()
{
 return view('about');
})->name('about-as');

How we use in views?

<a href="{{ URL::route("about-as") }}">about-as</a>

Hence laravel 'middleware'=>'auth' has already predefined for redirect as login page if user has not yet logged in.Hence we should use as keyword

    Route::get('login',array('as'=>'login',function(){
    return view('login');
}));

Answer 3

Try this method:

look for this file

"RedirectifAuthenticated.php"

update the following as you would prefer

 if (Auth::guard($guard)->check()) {
   return redirect('/');
 }

$guard as an arg will take in the name of the custom guard you have set eg. "admin" then it should be like this.

if (Auth::guard('admin')->check()) {
  return redirect('/admin/dashboard');
}else{
  return redirect('/admin/login');
}

Answer 4

**Adding this for the future me.**
I encountered this because I was reusing Laravel's "HomeController", and adding my custom functions to it. Note that this controller calls the auth middleware in its __construct() method as shown below, which means that all functions must be authenticated. No wonder it tries to take you to login page first. So, if you are not using Laravel's authentication scafffolding, you will be in a mess. Disable the constructor, or do as you seem fit, now that you know what is happening.

public function __construct()
{
    $this->middleware('auth');
}

Answer 5

In case of API , or let say while implementing JWT . JWT middleware throws this exception when it couldn't find the token and will try to redirect to the log in route. Since it couldn't find any log in route specified it throws this exception . You can change the route in "app\Exceptions\Handler.php"

use Illuminate\Auth\AuthenticationException;

protected function unauthenticated($request, AuthenticationException $exception){
        return $request->expectsJson()
             ? response()->json(['message' => $exception->getMessage()], 401)
            : redirect()->guest(route('ROUTENAME'));
}

Answer 6

I ran into this error recently after using Laravel's built-in authentication routing using php artisan make:auth. When you run that command, these new routes are added to your web.php file:

Auth::routes();

Route::get('/home', 'HomeController@index')->name('home');

I must have accidentally deleted these routes. Running php artisan make:auth again restored the routes and solved the problem. I'm running Laravel 5.5.28.