// API callback
hndlr({
  "error": {
    "code": 429,
    "message": "Quota exceeded for quota metric 'Queries' and limit 'Queries per day' of service 'customsearch.googleapis.com' for consumer 'project_number:683053208107'.",
    "errors": [
      {
        "message": "Quota exceeded for quota metric 'Queries' and limit 'Queries per day' of service 'customsearch.googleapis.com' for consumer 'project_number:683053208107'.",
        "domain": "global",
        "reason": "rateLimitExceeded"
      }
    ],
    "status": "RESOURCE_EXHAUSTED",
    "details": [
      {
        "@type": "type.googleapis.com/google.rpc.ErrorInfo",
        "reason": "RATE_LIMIT_EXCEEDED",
        "domain": "googleapis.com",
        "metadata": {
          "consumer": "projects/683053208107",
          "quota_limit": "DefaultPerDayPerProject",
          "quota_metric": "customsearch.googleapis.com/requests",
          "service": "customsearch.googleapis.com"
        }
      }
    ]
  }
}
);