vivek-athina

Results 2 issues of vivek-athina

Callback is working now in both streaming and non-stream modes ![Screenshot 2024-04-17 at 12 13 18 AM](https://github.com/BerriAI/litellm/assets/153479827/7957a149-1a96-45b7-a34b-ae402f2f5d25) ![Screenshot 2024-04-17 at 12 13 23 AM](https://github.com/BerriAI/litellm/assets/153479827/aac1f8ad-c48a-46dd-b2d2-2978d7bde39e) ![Screenshot 2024-04-17 at 12 13 30 ...