Change controller route name in ASP.NET Core MVC 404 error

Question

I want to change the route display name in URL, like below:

Access UserController display: https://localhost:7214/admin/login

Access CustomerController display: https://localhost:7214/customers/index

UserController.cs

[Route("admin")]
public class UserController : Controller
{
    [AllowAnonymous]
    public IActionResult Login(string returnUrl)
    {
        ViewBag.ReturnUrl = returnUrl;

        return View();
    }
}

CustomerController.cs

[Route("customers")]
public class CustomerController : Controller
{
    public IActionResult Index()
    {
        return View();
    }
}

Program.cs

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

app.Run();

But when I run the program, hit the following error:

I don't want to use Areas, any other options other than Areas?

Updated:

I modified code below in Program.cs

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

Access index page is find, but access route method, hit error 404.

public class CustomerController : Controller
{
    public IActionResult Index()  <-- working fine
    {
        return View();
    }

    [Route("test/export")]
    public IActionResult Test()  <-- error 404
    {
        return View();
    }
}

Answer 1

Routing from Contoller using Route attribute,

UserController:

[Route("admin/[action]/{id?}")]
public class UserController : Controller
{
    [AllowAnonymous]
    public IActionResult Login(string returnUrl)
    {
        ViewBag.ReturnUrl = returnUrl;

        return View();
    }
}

CustomerController:

[Route("customers/[action]/{id?}")]
public class CustomerController : Controller
{
    public IActionResult Index()
    {
        return View();
    }
}

Or you can add route in Startup.cs (Program.cs file for 6.0 and up).

Multiple conventional routes:

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

app.MapControllerRoute(
                name: "demo",
                pattern: "admin/{action}/{id?}",
                defaults: new { controller = "User", action = "Login" });

app.MapControllerRoute(
                name: "demo2",
                pattern: "customers/{action}/{id?}",
                defaults: new { controller = "Customer", action = "Index" });

Reference: Asp.net core Docs https://learn.microsoft.com/en-us/aspnet/core/mvc/controllers/routing?view=aspnetcore-6.0