The router's `.acompletion` method does not correctly call the `CustomLogger` hooks. Here is a MRE

```python import asyncio

import litellm from litellm.integrations.custom_logger import CustomLogger

class Handler(CustomLogger): def log_pre_api_call(self, model, messages, kwargs): print(f"Pre-API Call")

def log_post_api_call(self, kwargs, response_obj, start_time, end_time): print(f"Post-API Call")

def log_success_event(self, kwargs, response_obj, start_time, end_time): print(f"On Success")

def log_failure_event(self, kwargs, response_obj, start_time, end_time): print(f"On Failure")

async def async_log_success_event(self, kwargs, response_obj, start_time, end_time): print(f"On Async Success")

async def async_log_failure_event(self, kwargs, response_obj, start_time, end_time): print(f"On Async Failure")

router = litellm.Router( model_list=[ { "model_name": "default", "litellm_params": {"model": "mistral/mistral-large-latest"}, }, ], routing_strategy="usage-based-routing-v2", )

def sync_send_request(): response = router.completion( model=…