What would be the correct way to launch another coroutine based on the value returned from a flow?

Depends on the specific case. You case use filter+take(1) inside launch and do it sequentially i guess

The question is the root of the issue above. Basically a ui state of logged in/out that is exposed via a StateFlow. If logged in, then connect to a web service. Connecting to the web service needs to run until the app view model is terminated. I haven't been able to find any examples of such a common use case.

Why do you need to launch another coroutine?

Flow.collect()

takes a suspend lambda which you can do your job right there.

When the user is logged in, I'll get the auth token that is needed to connect to a web socket. That web socket needs to run async until the user logs out or exists the app. If I connect in the collect lambda, then it will interfere with processing logout state changes.

You can use

collectLatest

then.