How to link a virtual key to use specific credentials for a specifc model?

[akraines]

I setup litellm and am trying to configure it for my use case. However after spending considerable time getting things setup I came across what seems to be a major issue: I dont see a way to say that Virtual Key X should Access Models ABC using credentials PQR.
This means that if I have 3 users and each have a different anthropic key for billing purposes, there is no way to use litellm to ensure that when serving User 1 it will serve the anthropic Model using user 1's credentials.

Am I missing something?