access_by_lua '
  local sso_auth = require "sso-auth"
  return sso_auth.access()';
header_filter_by_lua '
  local sso_auth = require "sso-auth"
  sso_auth.headerFilter()';
body_filter_by_lua '
  local sso_auth = require "sso-auth"
  sso_auth.bodyFilter()';