Update the status of a live call in order to hang up. Call hang up may take time. A
202 status code is returned if the hangup request was successfully queued by FreeClimb. Otherwise, an error code is returned. If successfully queued, the asynchronous callback for the result will occur after some time through the statusCallbackUrl.
Any Call which is currently ringing is in progress from the point of view of FreeClimb and requires
status=completed to cancel it.