Laravel – Postman localhost Authentication

I created an API with Laravel 4 that I want to test so I'm using postman. When I input my username, my password and my URL:

http://127.0.0.1/stores/public/locator/api/service/v1/store

A popup shows and tells me to enter my username and password for localhost:80. How do I solve this problem?

Here is the route :

Route::resource('store', 'StoreController');

Route::filter('Apiauth', function()
{
 return Auth::basic("username");
);

Route::group(array('prefix' => 'locator/api/service/v1', 'before'=> 'Apiauth'),  function()
{
Route::resource('store', 'StoreController');
});