Disable an automation workflow. Once disabled, the workflow stops
accepting new trigger events.

Use contactsInWorkflow to control what happens to contacts
currently progressing through the workflow:

• keep: contacts remain and continue through the remaining blocks
  until completion. No new contacts enter.
• exit: all contacts are immediately removed from the workflow.
  Contacts who have not yet received their messages will not receive them.

Disabling an already-disabled automation is idempotent — returns the
current state without side effects.

Scopes:
automations.write