Using this library in local production

Hello, I was wondering how I might be able to access contacts when I'm running my codebase locally? (The auth status is always "Denied" when running locally, even though when I build it for production everything works as it should)

I imagine this has something to do with production vs development certificates, but I haven't found a very clear tutorial on how I should go about resolving that issue.

Let me know if there is any more information that will help.