public function startLogin()
 {
     $login = new loginModel();
     $login->email = $_POST['email'];
     $login->password = $_POST['password'];
     #this follows our system sequence diagram
     # call processLogin which returns a bool val
     $validLogin = $login->processLogin();
     if ($validLogin == true) {
         //self::showHomePage();
         header('Location:survey.php');
     } else {
         return;
     }
 }