Provide auth to page when using proxy

[tsrdatatech]

What is the current behavior?
Not sure how to add in auth to a page via proxy. Normally in puppeteer I would do:
await page.authenticate({ username: user, password: pass, });

If the current behavior is a bug, please provide the steps to reproduce

What is the expected behavior?
Would like to pass auth to the page via proxy

What is the motivation / use case for changing the behavior?

Please tell us about your environment:

• Version:
• Platform / OS version:
• Node.js version: