public FeedbackController(IFeedbackRepository repository, MapperFactory mapperFactory)
 {
     if (repository == null)
     {
         throw new ArgumentNullException(nameof(repository));
     }
     if (mapperFactory == null)
     {
         throw new ArgumentNullException(nameof(mapperFactory));
     }
     this.repository = repository;
     this.mapperFactory = mapperFactory;
 }