React Native example

[tobiaseisenschenk]

Would be great to have an example for how to use rxfire with react-native.

I guess the problem is that the rnfirebase api differs from firebase web. Therefore the authentication example does not work as described in the rxfire docs.
Something like:
const loggedIn$ = authState(firebase.auth()); loggedIn$.subscribe(user => { console.log(user); });
would error with listener is not a function.
However subscribing to rt-database objects works just like expected. But I could also simply fromEvent(ref, 'value') at this point i guess.