import { Auth as googleAuth } from "googleapis";

export async function authViaServiceAccount(
  scopes: string[],
  onBehalfOf: string,
  keyFile: string,
) {
  const auth = new googleAuth.JWT({
    keyFile,
    scopes,
    subject: onBehalfOf, // we need to impersonate the user we want to crawl a given user email; to be able to read their emails
  });
  await auth.authorize();
  return auth;
}