How to enabel Digest Authentication

I am using GenieACS 1.1.3 version, i have used the below steps to install it. I was able to successfully registered my CPE to ACS. now wanted to do digest authentication, how to enable it on ACS ?

this is for ACS to CPE authenticaion, i have modified auth.js and restarted the genieACS service , but still device goes without password… Please let me know the steps to achieve it