On Slack, I\'m aware that using chat.postMessage allows me to message each user individually, but how would I go about direct messaging the entire team (400 mem
Hello For that you need a channel with all 400 of them in it, cause currently you cannot send to 400 individual users. For sending message to a channel, you just need to add channel argument for postMessage method.
Check this :: https://api.slack.com/methods/chat.postMessage