What about subscriptions and user rights?

[Hideman85]

I like the concept of your repo, it is a pretty nice idea to provide simple code base for use cases so we can easily understand how to implement our own.

I'm just wondering about subscriptions, could you demonstrate better the subscriptions?

For example in Multi-user Chat App and in E-commerce App how would you solve these cases if I want to get the update on the data? With the right filtering?