Hi I want to use ory kratos in my existing app, let me brief my application flow first and then I'll ask you some questions related to implementation: I have a cloud based POS system, currently I'm managing the identities on my own db which is mysql, I have couple of modules and each module has its own repo, for the clients I also have couple of clients like mobile app, web client pos hardwares, currently we are using JWT token for auth, our backend is tottaly apis based written in nodejs So no we have plan to move our all identities to ory kratos and from ory kratos we want to accept JWT token as we are already using, so now anyone can guide me from where to I start and how it goes?

In principle, you can use kratos for identity management and self-service flows and then oahkeeper or alike in front of your apps to enforce authentication and authorization and to have a JWT issued based on the login session. That way, there is no need to change your backends as you can define, what should go into the JWT.

do you have any demo or example?