public FeedbacksController(IRetrospectiveDataRepository retrospectiveDataRepository, IConfiguration configuration)
        {
            _retrospectiveDataRepository = retrospectiveDataRepository ?? throw new ArgumentNullException("retrospectiveDataRepository");
            _configuration = configuration ?? throw new ArgumentNullException("configuration");

            _filePath = _configuration["FilePath"];

            //File configured in appsettings.json serves as the data source for this api
            if (string.IsNullOrEmpty(_filePath))
            {
                throw new Exception("Please make sure json file configured in appsettings.json exists in the specified folder location");
            }
        }