Problem with Laravel 5.5 - API Routes

Alright?

I'm here again with a new problem ... I'm using Laravel 5.5 and in this process I'm having problems with the routes using the API middleware.

For example, my web.php file is as follows

<?php

Route::get('/', function () {
    return view('welcome');
});

Route::group(['middleware' => ['cors', 'api'], 'prefix' => 'api'], function()
{
    Route::get('/', function () {
        return response()->json(['message' => 'Jobs API', 'status' => 'Connected']);;
    });

    Route::post('auth/login', 'AuthController@login');
});

I'm testing via PostMan routes, if I put the route

http://192.168.15.253:8091/sys-pesquisa/public/api/

I have the following return:

{
    "message": "Jobs API",
    "status": "Connected"
}

If I try to access the "POST" route (auth / login) I get the following message:

The page has expired due to inactivity. 

Please refresh and try again.

I noticed that if I change from POST to GET leaving ..

Route::get('auth/login' .........

I have the positive feedback:

{"result":false,"errors":["The senha field is required.","The usuario field is required."]}

But as that is an API that is going to be accessed via mobile application need to be sent via POST.

Finally, I have no idea what it might be, I researched and found some things talking about the 'VerifyCsrfToken' class, even adding it to the VerifyCsrfToken class:

protected $except = [
        'api/*'
    ];

But I did not succeed ... Can anyone help me?

Thank you guys!