Use collection config for slugs and correct locale for links

src/app/(payload)/collections/Users.ts

@@ -1,8 +1,9 @@
 import { CollectionConfig } from 'payload/types'
 import { isAdmin, isAdminOrSelf } from '@payload/access/isAdmin'
+import { COLLECTION_SLUG_USER } from './config'
 
 const Users: CollectionConfig = {
-  slug: 'users',
+  slug: COLLECTION_SLUG_USER,
   auth: true,
   admin: {
     defaultColumns: ['roles', 'email'],