Skip login if user is already logged (w/ Firebase)

Hi everyone,

I’ve a Login Page in my app, and users must login to access the app. But once users have been logged, it would be a lot better if the Login Page skips when they re-open the app.

I’ve tried a lot of solutions (code in the…), but none is working…
I’m pretty new to ionic, so maybe I’ve missed something. Do you have any good practices/ documentations to recommend?
Btw, I use Firebase login (email+password) for authentication.