public async Task <IList <object> > GetHeartbeatDataSince(string tileName, [FromQuery][Required][Range(1, 30)] int days, CancellationToken cancellationToken)
 {
     return(TileDtoMapper.Map(await _tileService.GetDataSinceAsync <HeartBeatData>(tileName, TileType.HeartBeat, _dateTimeOffsetProvider.Now.AddDays(-days), cancellationToken)));
 }