Cancel message
documentedStop a scheduled or currently outgoing message.
DELETE /notifications/{message_id}?app_id={app_id}Messagesno implementation yet0 runsInput
message_id*
Notification Message ID
notification_id
app_id*
OneSignal App ID
YOUR_APP_ID
Calls OneSignal as you (your API key is your account); keychains.dev holds the credentials.