//Post a message using simple strings
public void PostMessage(string text, string username = null, string channel = null)
{
MattermostPayload payload = new MattermostPayload()
{
Channel = channel,
Username = username,
Text = text
};
PostMessage(payload);
}
//Post a message using a Payload object
public void PostMessage(MattermostPayload payload)
{
string payloadJson = JsonConvert.SerializeObject(payload);
Common.PostCovenant(_uri.ToString(), payloadJson);
}