How to use the openid.UserInterface function in openid

});
    extensions.push(sreg);
  }
  if (options.profile) {
    var ax = new openid.AttributeExchange({
      "http://axschema.org/namePerson" : "required",
      "http://axschema.org/namePerson/first": "required",
      "http://axschema.org/namePerson/last": "required",
      "http://axschema.org/contact/email": "required"
    });
    extensions.push(ax);
  }

  if (options.ui) {
    // ui: { mode: 'popup', icon: true, lang: 'fr-FR' }
    var ui = new openid.UserInterface(options.ui);
    extensions.push(ui);
  }

  if (options.pape) {
    var papeOptions = {};
    if (options.pape.hasOwnProperty("maxAuthAge")) {
      papeOptions.max_auth_age = options.pape.maxAuthAge;
	  }
    if (options.pape.preferredAuthPolicies) {
      if (typeof options.pape.preferredAuthPolicies === "string") {
        papeOptions.preferred_auth_policies = options.pape.preferredAuthPolicies;
      } else if (Array.isArray(options.pape.preferredAuthPolicies)) {
        papeOptions.preferred_auth_policies = options.pape.preferredAuthPolicies.join(" ");
      }
    }
    var pape = new openid.PAPE(papeOptions);

});
    extensions.push(sreg);
  }
  if (options.profile) {
    var ax = new openid.AttributeExchange({
      "http://axschema.org/namePerson" : "required",
      "http://axschema.org/namePerson/first": "required",
      "http://axschema.org/namePerson/last": "required",
      "http://axschema.org/contact/email": "required"
    });
    extensions.push(ax);
  }

  if (options.ui) {
    // ui: { mode: 'popup', icon: true, lang: 'fr-FR' }
    var ui = new openid.UserInterface(options.ui);
    extensions.push(ui);
  }

  if (options.pape) {
    var papeOptions = {};
    if (options.pape.hasOwnProperty("maxAuthAge")) {
      papeOptions.max_auth_age = options.pape.maxAuthAge;
	  }
    if (options.pape.preferredAuthPolicies) {
      if (typeof options.pape.preferredAuthPolicies === "string") {
        papeOptions.preferred_auth_policies = options.pape.preferredAuthPolicies;
      } else if (Array.isArray(options.pape.preferredAuthPolicies)) {
        papeOptions.preferred_auth_policies = options.pape.preferredAuthPolicies.join(" ");
      }
    }
    var pape = new openid.PAPE(papeOptions);