How to add authentificaion method to request?

[Cym13 via Digitalmars-d-learn]

On Tuesday, 11 July 2017 at 12:15:39 UTC, Suliman wrote:
> I am using dlang-requests. I need authentificate on 
> https://scihub.copernicus.eu/dhus/login and than do some 
> data-parsing.
>
>     MultipartForm form;
>     form.add(formData("login_username", "Suliman"));
>     form.add(formData("login_password", "123")); // changed
>     auto content = 
> postContent("https://scihub.copernicus.eu/dhus/login", form);
>     writeln("Output:");
>     writeln(content);
>
> Return error about login pass. So it's seems that I need to add 
> BasicAuthentication method type. But how to add it?
>
>
> Browser console show next: https://snag.gy/VXaq2R.jpg

Something like:

Request req;
req.authenticator = new BasicAuthentication("login", "password");