Http - invalid authentication method

Add-ons Bindings
1

Hi all,

I have created a rule, like this:

var url = "https://username:password@ipverso.local.mydomain.com/api/system/time";
      var output = actions.HTTP.sendHttpGetRequest(url);
      logger.debug(output);

When I copy the url to my browser, I will get the expected json output.
But when I execute the rule I get:

{
  "success" : false,
  "error" : {
    "code" : 8,
    "description" : "invalid authentication method"
  }
}

The certificate is valid. Before I had a no certificate and there was another error.

So how can I use the same authentification method as my browser does?