customConfigReader.ts

import {
  LookerNodeSDK,
  NodeSettings,
  IApiSettings,
  IApiSection
} from "@looker/sdk";

/**
 * @class customConfigReader
 *
 * A custom configuration reader that overrides the readConfig() method
 * in NodeSettings to allow fetching client_id and client_secret
 * from anywhere.
 */
class customConfigReader extends NodeSettings {
  constructor(settings: IApiSettings) {
    super(settings);
  }
  /**
   * @returns an IApiSection object containing client_id and client_secret
   */
  readConfig(): IApiSection {
    return {
      client_id: "clientId",
      client_secret: "clientSecret"
    };
  }
}

(async () => {
  const sdk = LookerNodeSDK.init31(
    new customConfigReader({
      base_url: "https://<your-looker-server>:19999"
    } as IApiSettings)
  );

  const me = await sdk.ok(
    sdk.me(
      "id, first_name, last_name, display_name, email, personal_space_id, home_space_id, group_ids, role_ids"
    )
  );
  console.log({ me });
})();