To create an on-call group, first make sure you have correctly set up an integration to your on-call service in the Admin tab. (e.g. PagerDuty or Opsgenie).
Once you do that, Opal will import schedules from your on-call group provider so you can automatically manage access through your on-call schedules.
To create an on-call group, create a group as you normally would until you reach Step 3 (link to creating a group doc?). When you've reached Step 3, select On-call Managed Group as the Group Type.
Once you do this, you will see a new drop-down that says Select a schedule. If you integrated your on-call provider correctly in the previous step, you will see your schedules populating the drop-down. Select the schedule you would like to sync with Opal, and click Next.
Continue with the rest of the steps as you would for a normal group. (link to those docs)
✏️ TIP: You can add multiple schedules to one group. This is handy if you have different tiers of on-call assignments and need multiple on-call groups to have access to the same resources.