Getting Firebase Token?

I was wondering where to find / how to get the Requested Firebase Token??
I am trying to recive remote messages by using FCM, since its build in the engine.

Any idea how to get this working?

Did you manage to solve this?

Not this way! I chose a plugin from Xuifei (Pro version). Which has everything from firebase what you need (real-time database, remote config, etc). Also the online FirebaseCloudMessages

Does it give you access to the registration token?

You will receive the respective device token that was assigned by firebase. So, like Whatsapp, you can send notifications from smartphone to smartphone via request. If that’s what you mean