public static string GetTimeStamp(this SlackMessage message)
 {
     var serializer = new JsonSerializer<SlackRawDataModel>();
     var rawData = serializer.DeserializeFromString(message.RawData);
     return rawData.ts;
 }
 public static string GetChannelId(this SlackMessage message)
 {
     var serializer = new JsonSerializer<SlackRawDataModel>();
     var rawData = serializer.DeserializeFromString(message.RawData);
     return rawData.channel;
 }