How to call a controller by another controller's method in ASP NET MVC?

Question

ASP.NET

I have a Home controller with a Login method

public class HomeController : Controller
         //метод Index
        public ActionResult Login(User user)
        {
            if (userAvail)
            {
                return RedirectToAction("Index", "Account", user);
            }
            else{
                  return View("Index");
                  }
        }   
    }

I also have an Account controller with a single Index method.

public ViewResult Index()
        {
            ViewBag.info = "You have 0 messages";
            return View("Account");
        }

I want the Account controller to be triggered when the Login method of the Home controller is called.
View Account.cshtml:

@model Login.Models.User
<div>
        <h1>Welcome @Model.Name! </h1>
        <p>@ViewBag.info</p>
    </div>

I'm trying to redirect to the Index method of the Account controller upon successful login, but it says that the view was not found.
In ASP NET MVC quite recently, I wanted to write a simple authorization application while studying it, but I ran into such a problem. I am aware of the concept of MVC and therefore do not write account logic in the Home controller method.
I would be happy with an intelligent solution and, if possible, advice on organizing client-server applications in asp.

Answer 1

Your public ViewResult Index() method does not accept anything, and you pass it as the 3rd parameter. Remove the 3rd option. And authorization is forwarded through User.Identity.