[Bug]: async_log_pre_api_call not working

[metalshanked]

What happened?

The async_log_pre_api_call does not seem to get activated on a custom logger

from litellm.integrations.custom_logger import CustomLogger
import litellm
from fastapi import HTTPException

# This file includes the custom callbacks for LiteLLM Proxy
# Once defined, these can be passed in proxy_config.yaml
class MyCustomHandler(CustomLogger): # https://docs.litellm.ai/docs/observability/custom_callback#callback-class
    # Class variables or attributes
    def __init__(self):
        pass

    #### ASYNC #### 
    
    async def async_log_pre_api_call(self, model, messages, kwargs):
        pass

Relevant log output

Are you a ML Ops Team?

No

What LiteLLM version are you on ?

1.80.5

Twitter / LinkedIn details

No response