HTTP ステータスコードとエラー処理

{
  "error": {
    "message": "Error description",
    "type": "error_type",
    "code": "error_code"
  }
}

{
  "error": {
    "message": "Invalid API key",
    "type": "authentication_error",
    "code": "invalid_api_key"
  }
}

{
  "error": {
    "message": "Rate limit exceeded",
    "type": "rate_limit_error",
    "code": "rate_limit_exceeded"
  }
}

{
  "error": {
    "message": "Insufficient quota",
    "type": "insufficient_quota",
    "code": "insufficient_quota"
  }
}