Currently, there is no way to distinguish individual user usage when OpenShift Lightspeed (OLS) makes requests to the LLM provider.

This creates the following issues:

• Cost Allocation: not possible to track which users or teams are consuming the most tokens.
• Rate Limiting: not possible to apply rate limits per user (e.g., via LiteLLM) to prevent a single user from draining the organization's quota.

This configuration should allow to specify a custom HTTP header key (e.g., x-user-id or llm-user) that OLS will inject into every request sent to the LLM provider. Crucially, the value of this header should automatically populate with the authenticated OpenShift user's ID or username.

A proposal for doing it could be something similar to:

spec:
  llm:
    providers:
      - name: my-provider
        forward_authenticated_user_header: "X-User-ID" # NEW REQUESTED FEATURE