{
  "fields": {
    "id": {"from": "id"},
    "login": {"from": "username"},
    "full_name": {
      "from": "name",
      "fallback": "username"
    },
    "email": {
      "template": "${username}@example.com"
    },
    "language": "zh-CN",
    "is_admin": false,
    "last_login": {
      "func": "getCurrentTimestamp"
    },
    "created": {
      "from": "create_date",
      "func": "getFallbackTimestamp",
      "params": {"defaultValue": "2023-01-01T00:00:00.000Z"}
    },
    "visibility": "public",
    "followers_count": 0,
    "following_count": 0,
    "starred_repos_count": 0,
    "username": {"from": "username"}
  }
}