How to generate a certificate with a new custom Micro service with or without batch?

[paritshivani]

Hello @maheshkumargangula, @Krishnaj20, @rajeevsathish, @reshmi-nair

We have a use case where we need to issue the certificate to user for other contents/scenario than course completion
We want to write new Micro Service for it which will directly issue a certificate to users.

Analysis:
We have found out that following flow is happening in current system,
Flink job calls -> activity aggregate updater -> it will keep a track of users ==> this updates database to mark content consumption status as completed
Once it matches the criteria -> an event is called to another flink job certificate generator pre-processor -> this again generates event to collection certificate generator ==> this we need to skip as we do want to create new fling job
-> again an event is generated to RC block -> certificate api and certificate sign (certificate is generated)

But we don't want fling job dependency to call certificate issue/generate API calls. we want it to be called directly through custom micro service.

Want to understand how following points work:
Is it possible to create or issue a certificate with API calls
Can we directly call RC block APis to generate certificate through certificateapi and certificatesign?

cc: @coolbung, @vinukumar-vs @paritshivani @komalm @manishakapadnis