This scope lets an app "Edit the user’s Do Not Disturb settings"
This OAuth permission scope works with these Web API methods.
dnd.endDnd- Ends the current user's Do Not Disturb session immediately.
dnd.endSnooze- Ends the current user's snooze mode immediately.
dnd.setSnooze- Turns on Do Not Disturb mode for the current user, or changes its duration.