Testcafe - Typing user name and password into Native Dialog

I'm using Testcafe to test a corporate web solution.

One of the ways we authenticate is Windows authentication. If this type of authentication is enabled, on the page load, a native dialog appears and I have to type in user name and password and click Sign In, or Cancel.

I couldn't find an explanation or example of this in TestCafe.

Can anyone please help with this?