Post_8_10.cs

public class HomeController : Controller
{
  private IUserManager userManager;

  public HomeController(IUserManager userManager)
  {
    this.userManager = userManager;
  }

  [HttpGet]
  public IActionResult Index()
  {
    return this.View();
  }

  [HttpPost]
  public IActionResult Login()
  {
    User user = this.userManager.Validate("Email", "[email protected]", "admin");

    if (user != null)
      this.userManager.SignIn(this.HttpContext, user, false);

    return this.RedirectToAction("Index");
  }

  [HttpPost]
  public IActionResult Logout()
  {
    this.userManager.SignOut(this.HttpContext);
    return this.RedirectToAction("Index");
  }
}