FirebaseInstanceId.Instance.Token is depricated and returns null in Xamarin.Android using Xamarin.Firebase.Messaging

FirebaseInstanceId.Instance.Token is deprecated in favour of GetInstanceId<InstanceIdResult>(),

So GetInstanceId< InstanceIdResult >() is the recommended way,

This is how you can consume it,

var instanceIdResult = await FirebaseInstanceId.Instance.GetInstanceId().AsAsync<IInstanceIdResult>();
var token = instanceIdResult.Token;