refactor: add created_at field to user response schema and update dashboard display

app/apis/admin/get-users.ts

@@ -21,6 +21,7 @@ const userResponseSchema = z.object({
   email: z.string().email(),
   phone: z.string(),
   subscribe: subscribeResponseSchema,
+  created_at: z.string(),
 })
 const usersResponseSchema = z.object({
   data: z.array(userResponseSchema),

app/pages/dashboard-users/index.tsx

@@ -36,7 +36,7 @@ export const UsersPage = () => {
     },
     {
       title: 'Tanggal Daftar',
-      data: 'subscribe.start_date',
+      data: 'created_at',
     },
     {
       title: 'User',