title: Doing flutter firebase authentication server-side
body: <p>I am working on a flutter app with a firebase backend and I can't find any documentation for what I'm trying to do.  I am trying to have a user of my app (whose information is presumably stored in a FirebaseUser class) get their identity verified server-side and then if the identity is a certain user (verified by firebase serverless), they will be allowed to make a post to the db.  The firebase documentation has stuff for android, ios and web but not for cross-platform flutter development.  Can someone please point me in the right direction? I'm a little lost.  Thanks!</p>