public function ChangeColor()
{
$userId = $this->page->GetUserId();
Log::Debug('Changing reservation color for userId: %s', $userId);
$color = $this->page->GetReservationColor();
$user = $this->userRepository->LoadById($userId);
$user->ChangePreference(UserPreferences::RESERVATION_COLOR, $color);
$this->userRepository->Update($user);
}
