Barcode scan tweaks (#10992)

* Remove duplicate tooltip

* Adjust default value

* docs update

* Tweak unit test

* Fix playwright tests

src/frontend/tests/api.ts

@@ -1,10 +1,16 @@
 import { request } from '@playwright/test';
 import { adminuser, apiUrl } from './defaults';
 
-export const createApi = () =>
+export const createApi = ({
+  username,
+  password
+}: {
+  username?: string;
+  password?: string;
+}) =>
   request.newContext({
     baseURL: apiUrl,
     extraHTTPHeaders: {
-      Authorization: `Basic ${btoa(`${adminuser.username}:${adminuser.password}`)}`
+      Authorization: `Basic ${btoa(`${username || adminuser.username}:${password || adminuser.password}`)}`
     }
   });