Compatibility: RTM Events API
Events API Scope:
You opened a private channel
group_open event is sent to all connections for a user when a private
group is opened by that user.
This event is not available to bot user subscriptions in the Events API.
Events API compatibility
Subscribe to this event via the Events API.
Events of this type will be wrapped in metadata when sent via the Events API.
group_open requires the
groups:read OAuth permission scope.