Technical Dig Deep

The code was based off of Shared Game Lobby

Thorough writeup of the technical details
Open source and free to use to start your own applications
Created by the same developers as Unacog
Authentication, Firestore, Cloud Functions and Hosting are covered in detail

Architecture

Firebase is used for realtime data and scale on demand hosting. The API keys are contained on the server using Firebase Functions. Session is the main document with 3 subcollections, tickets, assists and packets. The packets are the data sent to the model API, assists are the resuls and tickets are the user prompts that show the UI feed for a session.

Cost Tracking

Account usage is tracking using a unit called a credit. Credits are directly bound to the cost of each API call.
Credits = [Token Count] * [Token Cost / 1000] + [1 per Request]
So a Tokens per Credit ~ 1000 / [Token Cost]

Notes

Output tokens are about twice the cost of input
Only the token count returned is used for output (not the max)
1 credit per request for overhead