{
  "success": true,
  "data": {
    "vk": {
      "oauth_id": "123456",
      "name": "Test User",
      "email": "test@example.com",
      "phone": "+79991234567",
      "linked_at": "2024-01-01T00:00:00Z"
    },
    "yandex": null
  }
}