public async Task <TicketDto> AddEntityAsync(TicketDto entity)
        {
            if (!_flightRepository.EntityExistsAsync(entity.FlightId).Result)
            {
                throw new NotFoundException();
            }

            var validationResult = await _validator.ValidateAsync(entity);

            if (!validationResult.IsValid)
            {
                throw new BadRequestException();
            }

            var mapedEntity = _mapper.Map <TicketDto, Ticket>(entity);
            await _repository.AddEntityAsync(mapedEntity);

            if (!_repository.SaveAsync().Result)
            {
                throw new Exception("Adding Ticket failed on save.");
            }

            return(_mapper.Map <Ticket, TicketDto>(mapedEntity));
        }