public Page<Booking> findBookings(SearchCriteria searchCriteria, String username) {
   if (username != null) {
     int page = searchCriteria.getPage();
     int size = searchCriteria.getPageSize();
     Page<Booking> bookingPage =
         bookingRepository.findBookings(username, new PageRequest(page, size));
     return bookingPage;
   }
   return null;
 }
 public void deleteBooking(Long id) {
   bookingRepository.delete(id);
 }
 public Booking save(Booking booking) {
   return bookingRepository.save(booking);
 }