OVR Entitlements and leaderboards issue

Hi there,

Can somebody please have a read of this and let me know where I am going wrong?

I am using the launcher version of UE4.27 and am trying to implement leaderboards.

1. I am using the latest Oculus Platform Tool from the Oculus Fork of 4.27
2. I have requested access to User name and IDs and this has been approved by Meta.
3. I have added in the relevant app ID and subsystem info to engine.ini
4. I have set up the game instance as suggested in Metas documentation and it would appear the Oculus platform is being successfully initialized.

However, my entitlement checks fail and when trying to write a leader board antry I get nothing.
I have included screens of my game Instance and Leaderboard code below. Though I am pretty sure I am missing key information such as User ID, App Secret etc but have no idea where to implement these.

Thanks for any help on this as it's starting to become something of grind looking for answers.
Please note that the data variable in the leaderboard is just an empty array as the wriote node requided there to be something in that slot.