Get $id without context

[Medformatik]

Is there a way to get the $id of the current user in initState, since I can't use context there?

Here is an example:

@override
void initState() {
    super.initState();
    boatsStream = DB.boat.streamBoats(uid); // Initialize the stream
}

I somehow need to get the users id here. But it's not only initState functions where I need to get the $id without context, for example in the toMap function of some of my models I also need it.

[Medformatik]

For the example above I can just move the initialization to the build method, but e.g. in my models there is no way of getting the context.

[lohanidamodar]

You need to refactor you code to use it other way. It works with context because we do need context to access the state data. As we are using the inherited widget, we need context to access the data. You can easily refactor your code to pass context.
For initState you could move your logic to didChangeDependencies (https://api.flutter.dev/flutter/widgets/State/didChangeDependencies.html)