I'm using Slack's Real Time Messaging API to track when my team members log into or out of Slack. Using the presence_change and manual_presence_change events I am notified when someone explicit changes their presence state (or if they're automatically set to "Away" after a period of inactivity).
But if a team members logs out (e.g. closes the Slack app) I do not receive any type of notification. Am I missing something or is there no way to be notified when someone logs into or out of Slack? I really don't want to have to resort to polling.