Function slack_api::chat::post_message

pub async fn post_message<'_, '_, '_, '_, R>(
    client: &'_ R, 
    token: &'_ str, 
    request: &'_ PostMessageRequest<'_>
) -> Result<PostMessageResponse, PostMessageError<R::Error>> where
    R: SlackWebRequestSender, 

Sends a message to a channel.

Wraps https://api.slack.com/methods/chat.postMessage