AngularFireIssue

I get this error when attempting to use the new Angular Fire 7 modular api to configure Firebase Realtime Database:

Error: AngularFireModule has not been provided at getSchedulers

Steps to Reproduce

1. npm install
2. Add your Firebase environment config settings in app.module
3. Run ng serve for a dev server. Navigate to http://localhost:4200/. The app will automatically reload if you change any of the source files.
4. You will see in browser developer tools the error: Error: AngularFireModule has not been provided at getSchedulers

Desired Behavior

Firebase Realtime Database is configured and I'm able to use injection token in Firebase Service to query the database.

Side Note

I have no issues configuring Firestore in this same way. I'm able to do this same provider/injection token pattern using initializeApp and getFirestore.