public async Task <List <Aircraft> > GetAllAircraftsInClub(string clubName)
        {
            if (clubName == string.Empty)
            {
                var aircrafts = await aircraftRepository.ListAllAsync();

                return(aircrafts as List <Aircraft>);
            }
            else
            {
                return(await aircraftRepository.GetAllInClub(clubName));
            }
        }