Merged PR 2315: Auth stabilistatiion and hardening

Related work items: #23020

components/myportal/servicebanner.js

@@ -1,8 +1,7 @@
 import useTranslation from "next-translate/useTranslation";
 import router from "next/router";
 import Link from "next/link";
-import { destroyCookie } from "nookies";
-import { signOut } from "next-auth/react";
+import { performPortalSignOut } from "../../lib/auth/sessionClient";
 
 const ServiceBanner = (props) => {
     props = props.props;
@@ -19,23 +18,14 @@ const ServiceBanner = (props) => {
     };
 
     const handleLogout = (locale) => {
-        console.info("////////////\n" + "logout" + "\n////////////");
-        window.localStorage.clear(),
-            destroyCookie(null, "next-auth.csrf-token"),
-            { path: "/" },
-            destroyCookie(null, "next-auth.callback-url", { path: "/" }),
-            destroyCookie(null, "pedw_locale", { path: "/" }),
-            destroyCookie(null, "pinsUser", { path: "/" }),
-            signOut({
-                callbackUrl: locale == "cy" ? "/cy/allgofnodi" : "/logout",
-            });
+        performPortalSignOut(locale);
     };
 
     const portalLogoLink = [
         "/myportal/[appealtypes]",
         "/newappeal",
         "/newappeal/[appealtypes]",
-        "/myportal/representation",
+        "/myportal/representation"
     ];
     return (
         <div className="servicebanner myportal govuk-!-margin-bottom-4">