Screenshotting a website that requires a login with Freezer c#

I'm trying to screenshot a website that requires a login using the .NET library freezer: https://github.com/haga-rak/Freezer/wiki

Using below code, I'm able to get a screenshot of any URL I enter

public void screenshotCreate(string url){var screenshotJob = ScreenshotJobBuilder.Create(url)            .SetBrowserSize(2560, 1440)            .SetCaptureZone(CaptureZone.FullPage)            .SetTrigger(new WindowLoadTrigger())            System.IO.File.WriteAllBytes(@"C:\Users\admin\documents\image.png", screenshotJob.Freeze());}

But if I enter a URL that has a webpage with login functionality, I'm just getting a screenshot of that login page.

For example:

If I wanted a screenshot of "My orders" page from amazon, I could set my URL to https://www.amazon.com/gp/css/order-history?ref_=nav_orders_first

Since my web browser is not logged in, it's simply displaying the sign-in page for amazon

In the documentation, there is code for adding cookies to the browser

var screenshotJob = ScreenshotJobBuilder.Create("https://yourwebsite.com")           .AddCookie(new Cookie("yourwebsite.com", "/", "CookieName", "1"));

but I'm unsure to interpret this code. Is it possible to load an existing cookie, say from my browser that has the login for Amazon stored?