[Feature]: Make key optional on /key/info

[Manouchehri]

The Feature

If the key query is not provided on a request to /key/info, I think LiteLLM should return the info about the current key being used in the Authorization: Bearer sk-... header.

Motivation, pitch

imo this reduces the need for #1614.

Twitter / LinkedIn details

https://www.linkedin.com/in/davidmanouchehri/

[krrishdholakia]

@Manouchehri that wouldn't solve my problem in #1614 of not being able to display user-friendly keys to users

Scenario: So app owner goes to your dashboard -> you get all the keys associated with their user id -> you display them by the alias'es specified by them / abbreviated keys -> they click on one -> see the logs of their token usage and cost logs for the app -> identify which end-users might be driving high-spend

[ishaan-jaff]

live here: ec3f497