function handleSignout(req, res) {
  if (!req.session) {
    return res.utils.data('signout', {});
  }
  req.session.destroy(function (err) {
    if (err) {
      appLog.error(err);
    }
    res.utils.data('signout', {});
  });
}
Clear out session regardless of auth strategy
@param {Req} req
@param {Res} res