アプリケーションのデフォルト認証情報を使用してクライアントを作成する

public static void implicit() {
  // Instantiate a client. If you don't specify credentials when constructing a client, the
  // client library will look for credentials in the environment, such as the
  // GOOGLE_APPLICATION_CREDENTIALS environment variable.
  BigQuery bigquery = BigQueryOptions.getDefaultInstance().getService();

  // Use the client.
  System.out.println("Datasets:");
  for (Dataset dataset : bigquery.listDatasets().iterateAll()) {
    System.out.printf("%s%n", dataset.getDatasetId().getDataset());
  }
}

// Import the Google Cloud client library using default credentials
const {BigQuery} = require('@google-cloud/bigquery');
const bigquery = new BigQuery();

use Google\Cloud\BigQuery\BigQueryClient;

/** Uncomment and populate these variables in your code */
//$projectId = 'The Google project ID';

$bigQuery = new BigQueryClient([
    'projectId' => $projectId,
]);

from google.cloud import bigquery

# If you don't specify credentials when constructing the client, the
# client library will look for credentials in the environment.
client = bigquery.Client()