Securing Azure OpenAI Usage with Azure Functions and Managed Identities: a Step-by-Step Guide

Hello! This is a great article for System-Assigned Managed Identity, thank you. 

Could you elaborate or provide a similar article for passing User-Principal credentials through an application/function? 

Example:

- Frontend: Azure Web App 

- Backend: Azure Function

- Scenario: User logs into the Azure Web App, attempts to chat with Azure OpenAI, but User-Principal has not been provided an RBAC Role on the Azure OpenAI Resource, therefore is denied access. 

Somehow the user needs to interact with an Authorization endpoint to check their RBAC Roles.