I don't understand how custom routes in Umbraco work. How can I access a controller's action through a URL from another website? Basically, I have another website for customer support from which employees should be able to access a customer's account with the customer's email only. The thing is I can't get the various tokens and the email to a controller.

The url I am testing with looks like this: host/login/externallogin/0000/0000/0000/xx@xx.com

Here is my custom route :

RouteTable.Routes.MapRoute(
            name: "ExternalLoginRoute",
            url: "login/{action}/{customerKey}/{sessionKey}/{token}/{email}",
            defaults: new
            {
                controller = "CustomRoutingHandlerController",
                customerKey = UrlParameter.Optional,
                sessionKey = UrlParameter.Optional,
                token = UrlParameter.Optional,
                email = UrlParameter.Optional
            });

Here the controller I made, I commented out almost everything to at least reach a breakpoint at the beginning of the controller

public class CustomRoutingHandlerController : Controller
{
    // GET: CustomRoutingHandler
    public ActionResult ExternalLogin(string customerKey, string sessionKey, string token, string email)
    {
    //BREAKPOINT NOT BEING REACHED HERE
        // Controller Code (removed)
        return View();
    }
}