Single API use for authenticated and guest user

My laravel application route configured on routes/api.php is.

<?php
use Illuminate\Http\Request;
Route::post('see_all_product',  'API\ProductController@see_all_product');
?>

Issue is i want to sent list of product but if user authenticated then send product favorite flag 1, and if not authenticated then sent return favorite 0

But both case send product list with favorite flag.

If i logged in with my user id and password and send request for see_all_product that time i m getting blank user.

$user = $request->user();

But if i set route like below i m getting user details.

<?php
use Illuminate\Http\Request;
Route::group(['middleware' => 'auth:api'], function(){
        Route::post('see_all_product',  'API\ProductController@see_all_product');
});
?>

Now if authorization set then i want user details.

API is same for both authenticated and guest user.

Please guide me where i can miss something?

via Chebli Mohamed