What is the best way for systems to communicate to each other.

[nielstj]

There are example project, it showcase how to use stores independently and as a single store.
However in real life use case, usually one system need to communicate to each other:

for example:
We have an authentication_system and sign_in_system.
A persist_session_event in auth system will be triggered by signed_in_event from sign_in_system.

Can you share how to achieve that with the framework?

[KhaliqCitrusbits]

Any Update on this?