Returns the number of seconds ago the issue was updated from current time.

def updated_time_delta(self):
        """Returns the number of seconds ago the issue was updated from current time.
        """
        local_timezone = tzlocal()
        update_at = datetime.datetime.strptime(self.updated_at, '%Y-%m-%dT%XZ')
        update_at_utc = pytz.utc.localize(update_at)
        update_at_local = update_at_utc.astimezone(local_timezone)
        delta = datetime.datetime.now(local_timezone) - update_at_local
        return int(delta.total_seconds())