Stream controller providing stale values for onModelReady()

I followed the pattern you suggested in provider-aechitecture-pt2

The flow is common as follows, login view gets user credentials , passes to login view model which then passes to auth service. After api call is successful auth service adds user to user stream controller and then on login success navigator.pushNamed()
Which pushes to homeview

ref - https://github.com/FilledStacks/flutter-tutorials/blob/master/012-provider-architecture-pt2/2-final/lib/ui/views/home_view.dart

onModelReady: (model) => model.loadData(Provider.of(context))

The issue I am facing is that the stream controller doesn't pass the user before model.loadData() is called for homeview. After reading a few articles I got to know that there is no way to ensure if streams deliver data. Am I missing something? how can I solve this issue?

Not sure if this is the right place to ask this question