'Dry method to change verified mode expiration.'

def _update_verified_mode_as_expired(self, course_id):

    mode = CourseMode.objects.get(course_id=course_id, mode_slug=CourseMode.VERIFIED)
    mode.expiration_datetime = datetime.datetime(year=1970, month=1, day=1, tzinfo=UTC)
    mode.save()
