Derived Reactive Observable State with Slice

In this scenario our application state service uses a Firefly Semantics Slice Object Store ( OStore) to store an authenticated User instance. Based on this state we will derive observable state indicating whether the user is authenticated. Stackblitz: https://stackblitz.com/edit/slice-derived-reactive-observable-state?file=index.ts Written Guide: https://developer.fireflysemantics.com/tasks/tasks--slice--derived-reactive-observable-state-with-slice Firefly Semantics Slice on NPM: https://www.npmjs.com/package/@fireflysemantics/slice