Need help getting google-auth-library working in bruno

[jlmanohar]

I need to authenticate with a Google cloud service account to get ID token (Not Oauth access token), so i installed google-auth-library node module as external library, whitelisted it and also allowed filesystem access, running in developer mode and not safe mode.

But i get URLSearchParam not defined as the error

What am i doing wrong ? any help is apprecieated as i am not well versed in javascript or bruno scripting. This code works when i rune as a node app in main function.

const { GoogleAuth} = require('google-auth-library');
const fs = require('fs');
const keys = JSON.parse(fs.readFileSync(<redacted, absolute path to my json service account key>, 'utf8'));
const targetAudience = "<redacted, my target audience>";

    const auth = new GoogleAuth({
      credentials: keys,
    });
    const client = await auth.getIdTokenClient(targetAudience);
    const s = await client.getRequestHeaders();
  

   console.log("Creds", client.credentials);

[VictorMelkor]

Hi! The error URLSearchParams is not defined usually means the environment where your code runs does not support some newer Web APIs that Node.js has by default (like URLSearchParams).

Why does this happen?

• When running your code in a non-Node.js environment (e.g., Bruno scripting engine, older JS engine, or restricted sandbox), some global classes like URLSearchParams may be missing.
• Your code works fine when run with Node.js because Node provides URLSearchParams natively since v10+.

How to fix?

1. Check runtime environment
   Verify if the environment supports all Node.js standard globals. If not, you may need to polyfill or avoid using libraries that depend on those.

2. Polyfill URLSearchParams
   If polyfilling is allowed, you can add a library like url-search-params-polyfill at the top of your script:

   require('url-search-params-polyfill');

This adds URLSearchParams if missing.

Use a pure Node.js environment for this code
Since your code uses google-auth-library designed for Node.js, running it in unsupported environments like Bruno scripting may cause these errors. Consider running authentication in a Node.js backend or server environment.

Alternative: Avoid google-auth-library if running in limited JS engine
You might need to manually craft HTTP requests with standard HTTPS calls if your environment restricts globals.

TL;DR:
The error happens because URLSearchParams is not available in your current runtime. Either:

Polyfill it,

Or run your code in a full Node.js environment.

If you're new to JavaScript or Bruno scripting, the cleanest approach is to run this code in Node.js, not inside Bruno script.