Stops an engagement before it finishes the final stage of the escalation plan or engagement plan. Further contacts aren't engaged.
See https://paws-r.github.io/docs/ssmcontacts/stop_engagement.html for full documentation.
ssmcontacts_stop_engagement(EngagementId, Reason = NULL)[required] The Amazon Resource Name (ARN) of the engagement.
The reason that you're stopping the engagement.