Differentiate users

For my app I want to differentiate the free users and premium users(who have paid for our service), if i have a database of them, how do i verify that in my zoom meet?
I want to provide different functionality based on their user status.
I was thinking of getUserContext() but it just info about
“screenName”: “Happy Zoomineer”,
“participantUUID”: “xxxxx”,
“role”: “host”,
“status”: “authorized”

so what is that one field by which i get to know that it is the same user who paid for my app service? coz participantuuid changes for each meeting i guess.
Just to give more context My app is used inside zoom meeting from the marketplace

Can someone pls guide me on this?