User login in umbraco using Surface controller

{
    public class UserController : SurfaceController
    {
        [HttpPost]
        public ActionResult UserLogin(SigInModel loginModel)
        {
            try
            {
                if (ModelState.IsValid)
                {
                    var memberservice = UmbracoContext.Application.Services.MemberService;
                    var user = Members.GetByEmail(loginModel.Email);
                    if (memberservice.Exists(loginModel.Email) && Members.Login(loginModel.Email, loginModel.Password))
                    {
                        FormsAuthentication.SetAuthCookie(loginModel.Email, false);
                        TempData["success"] = "User LogedIn Successfully";
                       
                        return RedirectToUmbracoPage(Umbraco.TypedContentAtRoot().FirstOrDefault().Id);
                    }
                    else
                    {
                        TempData["error"] = "Plese Register";
                    }
                }
                else
                {
                    TempData["error"] = "There is some issue with model validation";
                }
            }
            catch (Exception exp)
            {
                TempData["error"] = exp.Message;
            }
            return CurrentUmbracoPage();
        }
        [HttpPost]
        public ActionResult UserRegister(RegisterationModel registerModel)
        {
            try
            {
                if (ModelState.IsValid)
                {
                    var memberservice = UmbracoContext.Application.Services.MemberService;
                    if (!memberservice.Exists(registerModel.Email))
                    {
                        var defMemberType = memberservice.GetDefaultMemberType();
                        var newMemeber = memberservice.CreateMember(registerModel.Email, registerModel.Email, registerModel.Name, defMemberType);
                        memberservice.Save(newMemeber);
                        memberservice.SavePassword(newMemeber, registerModel.Password);
                        UmbracoContext.Application.Services.MemberService.AssignRole(newMemeber.Id, "Admin");
                        TempData["success"] = "You are succesfully registered";
                    }
                    else
                    {
                        TempData["error"] = "User already exists";
                    }
                }
                else
                {
                    TempData["error"] = "There is some issue with model validation";
                }
            }
            catch (Exception exp)
            {
                TempData["error"] = exp.Message;
            }
            return RedirectToCurrentUmbracoPage();
        }
    }
}