Follow the medium blog here:
Note: This repository does not contain all the neccessary installation files for Rasa X/Rasa, you must configure that yourself. This repo only contains the custom configuration needed to secure your Rasa REST endpoint.
You will find the overridden NGINX configuration at auth/rasax.nginx
You will find the custom connector in the connectors/secure_rest.py
I have only provided the customised configuration, for the full rasa setup, follow rasa docs