Currently, events can be scheduled like so:

await client.sendEvent({
  name: "user.created",
  payload: { name: "John Doe", email: "john@doe.com", paidPlan: true },
  deliverAt: new Date('2024'),
});

I want the ability to cancel them.

Either an identifier should be provided as an argument to the function or returned by it so that it can later be referenced when the scheduled event should be canceled.

Alternatively, there should be a completely separate API for scheduling events.