Restrict user collection to admins

payload/src/collections/Users.ts

@@ -1,5 +1,7 @@
 import { CollectionConfig } from 'payload/types';
 
+const isAdmin = ({ req: { user } }) => (user && user.role === 'admin');
+
 const Users: CollectionConfig = {
   slug: 'users',
   auth: true,
@@ -7,10 +9,29 @@ const Users: CollectionConfig = {
     useAsTitle: 'email',
   },
   access: {
-    read: () => true,
+    read: isAdmin,
   },
   fields: [ 
-    // Email added by default
+    {
+      name: 'role',
+      type: 'select',
+      options: [
+        { label: 'ssg', value: 'ssg' }, //cRud
+        { label: 'Admin', value: 'admin' }, //CRUD, role creation
+        { label: 'Editor', value: 'editor' }, //CRUD
+        { label: 'User', value: 'user' }, //CRUd
+      ],
+      required: true,
+      defaultValue: "user",
+      access: {
+        create: isAdmin,
+        read: isAdmin,
+        update: isAdmin,
+      },
+      admin: {
+        readOnly: !isAdmin
+      }
+    },
     {
       name: 'name',
       type: 'text',