public function modifyUser()
 {
     $username = $_POST['userName'];
     $userLastName = $_POST['userLastName'];
     $userPassword = $_POST['password'];
     $passwordAgain = $_POST['rePassword'];
     $userDao = new UserDao();
     $userInfoDao = new UserInfoDao();
     $uid = getUID();
     $user = $userDao->selectUserById($uid);
     $user->lastName = $userLastName;
     $user->password = $userPassword;
     $user->name = $username;
     User::readProperties($user, $_POST);
     $user->setInstitutionName($_POST['InstitutionName']);
     $userDao->updateUser($user, $uid);
     $userInfoDao->modifyUserInfo($id, $user);
 }