improvement for the backend api

lib/mocks/data/users.ts

@@ -6,20 +6,14 @@ import { User } from "@/lib/types/api";
 
 export const mockUsers: User[] = [
   {
-    id: "1",
+    id: "550e8400-e29b-41d4-a716-446655440001",
     telegram_id: 123456789,
     username: "ivan_test",
-    first_name: "Иван",
-    last_name: "Иванов",
-    created_at: "2024-01-15T10:00:00.000Z",
   },
   {
-    id: "2",
+    id: "550e8400-e29b-41d4-a716-446655440002",
     telegram_id: 987654321,
     username: "maria_test",
-    first_name: "Мария",
-    last_name: "Петрова",
-    created_at: "2024-02-01T10:00:00.000Z",
   },
 ];