public List <Run> ConvertJsonToRun([FromBody] List <OldRun> oldRuns)
        {
            var runs = new List <Run>();

            for (var i = 0; i < oldRuns.Count; i++)
            {
                var run = new Run();

                run.Date     = DateTime.Parse(oldRuns[i].Date);
                run.Duration = TimeSpan.FromSeconds(oldRuns[i].Duration * 60);
                run.Length   = oldRuns[i].Distance;
                run.Surface  = oldRuns[i].Comment.ToString();
                run.RunKey   = oldRuns[i].Key;
                runs.Add(run);
            }

            _dataRepository.AddMany(runs);

            return(_dataRepository.GetAll().ToList());
        }