Blazor Web Assembly and Windows Authentication

// In Program.cs
builder.Services.AddHttpClient<IClient, Client>()
    .AddHttpMessageHandler<CredentialsMessageHandler>();

// In CredentialsMessageHandler.cs
public class CredentialsMessageHandler : DelegatingHandler
{
    protected override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
    {
        request.SetBrowserRequestCredentials(BrowserRequestCredentials.Include);
        return base.SendAsync(request, cancellationToken);
    }
}