public ActionResult ChangePassword(ChangePasswordViewModel model)
        {
            if (ModelState.IsValid)
            {
                bool isPasswordChanged;

                try
                {
                    isPasswordChanged = WebSecurity.ChangePassword(WebSecurity.CurrentUserName, model.OldPassword, model.NewPassword);
                }
                catch (Exception)
                {
                    isPasswordChanged = false;
                }


                if (isPasswordChanged)
                {
                    var korisnik = Repozitorij.GetKorisnik();
                    Repozitorij.ChangePassword(korisnik.IDDjelatnik, model.NewPassword);
                    return(RedirectToAction("Login", "Account"));
                }
                else
                {
                    ModelState.AddModelError("CurrentPassword", "Stara lozinka nije ispravno unesena.");
                }
            }

            return(View());
        }