{
  "data": {
    "total": 50,
    "created": 45,
    "updated": 0,
    "skipped": 3,
    "failed": 2,
    "results": {
      "created": [
        {
          "index": 0,
          "id": 123,
          "identifier": "user1@example.com"
        }
      ],
      "skipped": [
        {
          "index": 5,
          "reason": "duplicate_email",
          "identifier": "existing@example.com"
        }
      ],
      "failed": [
        {
          "index": 10,
          "reason": "validation_error",
          "message": "Invalid email format",
          "identifier": "invalid-email"
        }
      ]
    }
  }
}

{
  "message": "Unauthenticated."
}

{
  "message": "The given data was invalid.",
  "errors": {
    "email": [
      "The email field is required.",
      "The email must be a valid email address."
    ]
  }
}