@Pravin if you mean you would like to use client certificate authentication for your connection (as opposed to basic auth), the Python API supports that. I don’t have any code at the moment, but it’s mainly just a set of properties in the config. The API docs show this here: solace.messaging.config.solace_properties package — Solace PubSub+ API For Python 2024 documentation
Do you have your client certs set up and loaded on the broker?