访问Prestashop webservice，PHP Curl获得401 Unauthorized访问权限，但可以在浏览器中使用

Question

I am using PrestaShopWebservice library to access Prestashiop 1.7 Webservice, I always get 401 Unauthorized but it is accessible in browser.

I have already tried adding:

SetEnvIf Authorization "(.*)" HTTP_AUTHORIZATION=$1
RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]

in .htaccess
also tried concatenating &ws_key="token"

but nothing works

 $url = 'http://someurl/api/';
 $token = 'mytoken';
 try {
    $webService = new \PrestaShopWebservice($url, $token, true);
    $xml = $webService->get(['resource'=>'products']);
    var_dump($xml);
 }
 catch (\PrestaShopWebserviceException $ex) {
    echo 'Other error: <br />' . $ex->getMessage();
 }