public ActionResult ChangeEmail(string oldEmail, string newEmail, string password)
 {
     if (mDB.isUserExists((int)Session["id"], password) == true)
     {
         mDB.UpdateEmail((int)Session["id"], newEmail);
         Session["error"] = "Sėkmingai pakeistas paštas";
     }
     else
     {
         Session["error"] = "Klaida pakeičiant paštą";
     }
     return(RedirectToAction("Settings"));
 }