Added error handling

Author: Ria Jain

components/backends/trtllm/src/dynamo/verifier/utils/api_drafter.py

@@ -90,6 +90,11 @@ async def get_draft_tokens(
 
             draft_tokens = []
             try:
+                if self.client is None:
+                    logging.error(
+                        f"Failed to create client for Dynamo endpoint: {self.endpoint}"
+                    )
+                    return []
                 response = await self.client.round_robin(request_data)
                 async for chunk in response:
                     chunk_data = chunk.data()