running asp.net intranet application on localhost asking for authentication

I have an intranet application written int ASP.net core, when I run this application on localhost, I get a pop window asking me to authenticate and once I enter my domain name\my username and password then it authenticates me and lets me run the application. Basically, I enter my Windows username and password and then I can see the application. Below is the screen of what I am getting:

this is what I tried:

1. went to the folder where the application resides
2. right click on it and click on the properties
3. properties->Security tab and gave full control to myself. Below is the screenshot:

This is what I have in web.config file:

<?xml version="1.0" encoding="utf-8"?>
<configuration>

  <location path="." inheritInChildApplications="false">
    <system.webServer>
      <security>
        <authentication>
          <anonymousAuthentication enabled="false" />
          <windowsAuthentication enabled="true" />
        </authentication>
      </security>
    </system.webServer>
  </location>
  <runtime>
 
  </runtime>
</configuration>

this is my IISExpress settings:

This is my startup.cs file:

public class Startup
 {
     public IConfiguration Configuration { get; }
     private const string DefaultConnection = "DefaultConnection";
     public Startup(IConfiguration configuration)
     {
         Configuration = configuration;
     }
     public void ConfigureServices(IServiceCollection services)
     {
         services.AddDbContext<AckPackage.Data.AckContext>(options =>
             options.UseSqlServer(
                 Configuration.GetConnectionString(DefaultConnection)));
         services.Configure<CookiePolicyOptions>(options =>
         {
             // This lambda determines whether user consent for non-essential cookies is needed for a given request.
             options.CheckConsentNeeded = context => true;
             options.MinimumSameSitePolicy = SameSiteMode.None;
         });
         //services.AddAuthentication(options =>
         //{
         //    options.DefaultAuthenticateScheme = IISDefaults.AuthenticationScheme;
         //    options.DefaultChallengeScheme = IISDefaults.AuthenticationScheme;
         //});
         services.AddAuthentication(NegotiateDefaults.AuthenticationScheme)
           .AddNegotiate();
         services.AddAuthorization(options =>
         {
             options.FallbackPolicy = options.DefaultPolicy;
         });
         services.AddHttpContextAccessor();
         services.AddControllersWithViews();
         services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();
         services.AddDistributedMemoryCache();
         services.AddSession(options =>
         {
             options.IdleTimeout = TimeSpan.FromSeconds(120);
             options.Cookie.HttpOnly = true;
             options.Cookie.IsEssential = true;
         });
         services.AddRazorPages();
         //services.AddMvc().AddRazorRuntimeCompilation();
         services.BindingAppServices(Configuration);
         services.Configure<Microsoft.AspNetCore.Http.Features.FormOptions>(x =>
         {
             x.ValueLengthLimit = int.MaxValue;
             x.MultipartBodyLengthLimit = int.MaxValue; // In case of multipart
         });
     }
     public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
     {
         if (env.IsDevelopment())
         {
             app.UseDeveloperExceptionPage();
         }
         else
         {
             app.UseExceptionHandler("/Home/Error");
             // The default HSTS value is 30 days.
             app.UseHsts();
         }
         app.UseHttpsRedirection();
         app.UseStaticFiles();
         app.UseRouting();
         app.UseAuthentication();
         app.UseAuthorization();
         app.UseSession();
         app.UseEndpoints(endpoints =>
         {
             endpoints.MapControllerRoute(
                 name: "default",
                 pattern: "{controller=Employee}/{action=Create}/{id?}");
             endpoints.MapRazorPages();
         });
         // app.MapRazorPages();
     }

any help will be greatly appreciated.