Module "license name"

Hello I am on opencart 2.1.0.1, I have a custom template, I am looking for a module that when registering new customers, it would automatically send them a license number with their username for example but Do not find, can you help me thanks

I would like for example a module that sends a message right after the store registration style:
"Your license number is CHP-" and behind the username of the person who just signed up, is what you can help me, thanks

please can you help me for a module