diff --git a/ams-express-shopping/auth/authenticate.js b/ams-express-shopping/auth/authenticate.js
index 60b3748..0bc784d 100644
--- a/ams-express-shopping/auth/authenticate.js
+++ b/ams-express-shopping/auth/authenticate.js
@@ -37,12 +37,13 @@ https://www.npmjs.com/package/@sap/xssec#testing
 function buildMockAuthMiddleware() {
     return async function mockAuthentication(req, res, next) {
         const basicAuthUser = req.headers['authorization']?.split(' ')[1];
-        if (!basicAuthUser) {
+        const user = Buffer.from(basicAuthUser, 'base64').toString().split(':')[0];
+        const [username, api] = user.split('|');
+
+        if (!username) {
             return res.sendStatus(401);
         }
 
-        const user = Buffer.from(basicAuthUser, 'base64').toString().split(':')[0];
-        const [username, api] = user.split('|');
         const mockPayload = {
             app_tid: "default",
             scim_id: username,
diff --git a/ams-express-shopping/service/privileges.js b/ams-express-shopping/service/privileges.js
index 907d939..ce15f2f 100644
--- a/ams-express-shopping/service/privileges.js
+++ b/ams-express-shopping/service/privileges.js
@@ -1,3 +1,5 @@
+const { AMS_AUTHORIZATIONS } = require("@sap/ams");
+
 /**
  * Returns the potential privileges of the user to determine which UI elements to show.
  * @param {import("@sap/ams").AuthorizedRequest} req 
diff --git a/ams-express-shopping/ui/index.html b/ams-express-shopping/ui/index.html
index ec483ef..ef286d9 100644
--- a/ams-express-shopping/ui/index.html
+++ b/ams-express-shopping/ui/index.html
@@ -16,7 +16,7 @@ <h1>AMS Shopping Application</h1>
                 <option value="alice">alice</option>
                 <option value="bob">bob</option>
                 <option value="carol">carol</option>
-                <option value="none">none</option>
+                <option value="">none</option>
             </select>
             <label for="external-api-checkbox">ExternalOrder (order total < 100)</label>
             <input type="checkbox" id="external-api-checkbox">