Program.cs

using DAS_Server_SignalR.DatabaseSettings;
using DAS_Server_SignalR.Entities.Users;
using DAS_Server_SignalR.SignalR;
using Microsoft.AspNetCore.Authentication.Cookies;
using System.Text.Json;
using System.Text.Json.Serialization;

var builder = WebApplication.CreateBuilder(args);
var services = builder.Services;
var configuration = builder.Configuration;

// Add services to the container.
services.AddAuthentication(options =>
{
    options.DefaultScheme = CookieAuthenticationDefaults.AuthenticationScheme;
})
.AddCookie(options =>
{
    options.LoginPath = "/api/account/google-login"; // Must be lowercase
})
.AddGoogle(googleOptions =>
{
    googleOptions.ClientId = configuration["Authentication:Google:ClientId"];
    googleOptions.ClientSecret = configuration["Authentication:Google:ClientSecret"];
});

services.AddControllers()
.AddJsonOptions(o =>
{
    o.JsonSerializerOptions.Converters.Add(new JsonStringEnumConverter());
    o.JsonSerializerOptions.PropertyNameCaseInsensitive = true;
});
services.AddSignalR();

services.Configure<CsunFsaeDatabaseSettings>(
    configuration.GetSection("CsunDasDatabase"));

services.AddSingleton<UserService>();
services.AddSingleton<RaceHub>();

services.AddCors(options =>
{
    options.AddPolicy("ClientPermission", policy =>
    {
        policy.AllowAnyHeader()
            .AllowAnyMethod()
            .WithOrigins("https://localhost:44438")
            .AllowCredentials();
    });
});

var app = builder.Build();

// Configure the HTTP request pipeline.
if (!app.Environment.IsDevelopment())
{
    // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
    app.UseHsts();
}

app.UseAuthentication();
app.UseAuthorization();

app.UseHttpsRedirection();
app.UseStaticFiles();
app.UseRouting();
app.UseCors("ClientPermission");
app.MapHub<RaceHub>("/racehub");

app.MapControllerRoute(
    name: "default",
    pattern: "{controller}/{action=Index}/{id?}");

app.MapFallbackToFile("index.html"); ;

app.Run();