chore: do not allow modifying user document, so that people can't reset the deployed demo password

payload.config.ts

@@ -32,6 +32,15 @@ export default buildConfig({
   //editor: slateEditor({}),
   editor: lexicalEditor(),
   collections: [
+    {
+      slug: 'users',
+      auth: true,
+      access: {
+        delete: () => false,
+        update: () => false,
+      },
+      fields: [],
+    },
     {
       slug: 'pages',
       admin: {