Program.cs

using aspnet_mongo.Models;
using NuGet.Configuration;

var builder = WebApplication.CreateBuilder(args);

ContextMongoDb.ConnectionString = builder.Configuration.GetSection("MongoConnection:ConnectionString").Value;
ContextMongoDb.DatabaseName = builder.Configuration.GetSection("MongoConnection:Database").Value;

ContextMongoDb.IsSSL = Convert.ToBoolean(builder.Configuration.GetSection("MongoConnection:IsSSL").Value);

// adicionando o serviço do identity
builder.Services.AddIdentity<ApplicationUser, ApplicationRole>()
    .AddMongoDbStores<ApplicationUser, ApplicationRole, Guid>(
        ContextMongoDb.ConnectionString, ContextMongoDb.DatabaseName);

// Configurar as opções de conexão
builder.Services.Configure<Settings>(builder.Configuration.GetSection("ConnectionStrings"));

// Registrar o contexto MongoDB
builder.Services.AddSingleton<ContextMongoDb>();


// Add services to the container.
builder.Services.AddControllersWithViews();

builder.Services.ConfigureApplicationCookie(options =>
{
    options.LoginPath = "/Login/Index";
    options.LogoutPath = "/Logout/Logout";
    options.AccessDeniedPath = "/Home/AccessDenied";
});

var app = builder.Build();

// Configure the HTTP request pipeline.
if (!app.Environment.IsDevelopment())
{
    app.UseExceptionHandler("/Home/Error");
}
app.UseStaticFiles();

app.UseRouting();

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

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

app.Run();