static laravel basic.auth with username and password in config file

filters.php

<?php
/**
 * change this definition in filters.php.
 * 
 * the code checks if the auth parameters matches the credentials in your config file, if not
 * a WWW-Authenticate Header will be send to the client.
 */
Route::filter('auth.basic', function () {
    $login = false;

    if (isset($_SERVER['PHP_AUTH_USER']) && isset($_SERVER['PHP_AUTH_PW'])) {
        // check credentials from config.
        if (
            $_SERVER['PHP_AUTH_USER'] === Config::get('app.username') && 
            $_SERVER['PHP_AUTH_PW'] === Config::get('app.password')
        ) {
            $login = true;
        }
    }

    if ($login === false) {
        return Response::make('Invalid credentials.', 401, ['WWW-Authenticate' => 'Basic']]);
    }
});