Sign in with Apple w/ Firebase Apple Provider

I'm having a problem with Apple recognizing my redirect url as valid. when making requests for user sign in through firebase.

I used this tutorial to create a serviceID and private key, which I then setup on my end with firebase.

Steps taken

• Create serviceID
  1. Tied to primary app ID that is configured for sign in with Apple
  2. Added domains for firebase hosted site
  3. Added return url provided by firebase
• Create private key
  1. Associated to the same primary app ID as the service ID
  2. Downloaded the key and placed it's content in firebase
  3. Added the team ID and key ID
• Setup client to use new OAuthProvider with redirects to Apple signin

Is there a tool for validating redirect urls or location with logs to help me debug which part of my redirect Url is incorrect?

Thanks