/// <summary>
 /// Retrieve list of Concerts
 /// </summary>
 /// <returns></returns>
 public IEnumerable <ConcertDTO> Get()
 {
     return(Mapper.Map <IEnumerable <ConcertDTO> >(concertService.GetAll()));
 }
 public async Task <ConcertsCount> GetConcerts(int page, int size)
 {
     return(await concertService.GetAll(page, size));
 }