Attach a Slack user group to a schedule. If the schedule already has a Slack user group attached, it will be updated.
Note that user groups are available only in paid Slack plans.
Enter your API key which starts with 'keeper_'
The ID of the schedule.
Default Response
{
"id": "S083J1KTL9X",
"name": "Incident responders",
"handle": "incident-responders"
}