Stops an engagement before it finishes the final stage of the escalation plan or engagement plan. Further contacts aren't engaged.
See https://www.paws-r-sdk.com/docs/ssmcontacts_stop_engagement/ 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.