How to record windows authentication popup in playwright test framework

I faced the same issue, unless the login window even didn't show up at first.

To prevent usage of the current user and start showing the login popup: How to disable Integrated Windows Authentication (IWA) for Chrome via Windows' Control Panel:

(This applies to both Internet Explorer and Chrome since Chrome uses system settings that are managed using Internet Explorer.)

1. Press Windows' Start button, type "Internet Options" to search, and click the one result, from the control panel

2. Go to the "Security" tab

3. Select "Local Intranet" and click on "Custom Level" button

4. Scroll to the "User Authentication" section at the bottom of the list and select "Prompt for user name and password"

5. Click Ok, Apply, and Ok to save changes.

6. Close all instances of the IE browser to make the changes effective. Launch the browser again and access the application. A basic authentication challenge will be served.

To login as desired user: HTTP Authentication

using var context = await Browser.NewContextAsync(new()
{
    HttpCredentials = new HttpCredentials
    {
        Username = "bill",
        Password = "pa55w0rd"
    },
});
var page = await context.NewPageAsync();
await page.GotoAsync("https://example.com");