Thank you so much for putting this out there, and for making a great video explaining everything. In case you didn't know, they changed how scripts work in C3 so you get a warning now when you open your project. Don't know if it breaks anything yet.
Also I'm wondering about the developerSecretKey variable in PlayFabClientApi.js - it says to not expose the secret key but when you export your game (at least as an NW project) it's there for everyone to open?