public IActionResult DeleteAd(int id)
        {
            var ad = _context.Advertisement.FirstOrDefault(x => x.Id == id);

            _context.Remove(ad);
            _context.SaveChanges();
            return(Ok());
        }
        public IActionResult RemoveRequest(int id)
        {
            var request = _context.TripRequest.FirstOrDefault(x => x.Id == id);

            _context.Remove(request);
            _context.SaveChanges();
            return(Ok());
        }