✅ .net 7 rest api CORS issue with Authentication

Hey so I'm trying to set up something I've never done before so I can get the PC name of people connecting to my API
(This is a business Intranet website that calls the api)
blah blah blah
using Microsoft.AspNetCore.Authentication.Negotiate;

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.
builder.Services.AddSingleton<DapperContext>();
builder.Services.AddScoped<IRepo, Repo>();
builder.Services.AddHttpContextAccessor();
builder.Services.AddControllers();
// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle

builder.Services.AddCors(options =>
{
    options.AddDefaultPolicy(
        policy =>
        {
            policy.WithOrigins("http://localhost:4200/",
                                "https://localhost:4200/").AllowAnyMethod().AllowAnyHeader().AllowCredentials();
        });
});
builder.Services.AddAuthentication(NegotiateDefaults.AuthenticationScheme)
   .AddNegotiate(); // which used by microsoft.aspnetcore.authentication.negotiate nuget package
builder.Services.AddAuthorization(options =>
{
    // By default, all incoming requests will be authorized according to the default policy.
    options.FallbackPolicy = options.DefaultPolicy;
});



builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();

var app = builder.Build();
//after app intialization:
app.UseCors();
app.UseAuthentication();
app.UseAuthorization();





// Configure the HTTP request pipeline.
//if (app.Environment.IsDevelopment())
//{
    app.UseSwagger();
    app.UseSwaggerUI();
//}

app.MapControllers();


app.Run();


This is my program.cs
it works as intended in swagger but when I use my front end app it gives me a cors error

Any help would be appreciate
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