How to batch add members to a Google group, using the Admin API? #3899

import { Auth, admin_directory_v1 as directoryV1 } from 'googleapis';

class GoogleGroupsService {
  private async getAdminApi (): Promise<directoryV1.Admin> {
    try {
      const scopes = [
        'https://www.googleapis.com/auth/admin.directory.group',
        'https://www.googleapis.com/auth/admin.directory.group.member'
      ];

      const jwtClient = new Auth.JWT(
        this.keyConfig.clientEmail,
        undefined,
        this.keyConfig.privateKey.replace(/\\n/g, '\n'),
        scopes
      );

      const adminApi = new Admin({
        auth: jwtClient
      });

      await jwtClient.authorize();

      return adminApi;
    } catch (error) {
      logger.error('Service account authentication failure', error);
      throw new Error('Service account authentication failure');
    }
  }

  async addEmailToGroup (email: string, groupKey: string, role: 'OWNER' | 'MEMBER' = 'MEMBER', syncLogger = logger) {
    if (!this.enabled) {
      logger.warn('Google Group service is disabled');
      return;
    }

    syncLogger.debug(`Adding ${email} to ${groupKey}, with role ${role}`);

    const adminApi = await this.getAdminApi();
    await adminApi.members.insert({
      groupKey,
      requestBody: {
        email,
        role,
        type: 'USER'
      }
    });
  }
}