[
  {
    "userName": "bill.gates",
    "email": "bill.gates@microsoft.com",
    "createdAt": { "$date": "2026-06-15T00:00:00Z" }
  },
  {
    "userName": "elon.musk",
    "email": "elon.musk@tesla.com",
    "createdAt": { "$date": "2026-06-15T00:00:00Z" }
  }
]