Keeping login status in Flutter Web

I'm new to Web development and I'm playing around with Flutter for Web.

I have a question, towards handling of Login in Flutter Web. What's the best practice of it?

As I came from Mobile background it's very easy - all we need to have a user singleton/use shared prefs and check it before doing any operation. But how this would be implemented in Flutter Web?

Hope my question is clear enough.

Cheers