Using Torii - session service doesn't inject into routes/controllers

Have pored over several tutorials for an EmberFire / Torii setup and am not able to get the session service to work at all. Is a step missing or is there possibly an issue with newer versions of EmberJS when injecting the session service?

environment.js

module.exports = function(environment) {
  var ENV = {
    ...
    firebase: {
      apiKey: '',
      authDomain: '',
      databaseURL: '',
      storageBucket: ''
    },
    torii: { sessionServiceName: 'session' },
    ...
  };
}

app/torii-adapters/application.js

import Ember from 'ember';
import ToriiFirebaseAdapter from 'emberfire/torii-adapters/firebase';

export default ToriiFirebaseAdapter.extend({
  firebase: Ember.inject.service()
});

routes/application.js

import Ember from 'ember';

export default Ember.Route.extend({
  beforeModel: function() {
    return this.get("session").fetch().catch(function() {});
  },
  ...
}

Browser console when visiting application route:

ember.debug.js:28058Error while processing route: index Cannot read property 'fetch' of undefined TypeError: Cannot read property 'fetch' of undefined

Guides consulted while trying to sort this out: http://www.programwitherik.com/emberjs_2-0_example_app_with_firebase/ http://www.danielgynn.com/third-party-auth-in-ember-with-firebase/

Package versions - “ember-cli”: “2.3.0”, “emberfire”: “2.0.1”, “ember”: “~2.3.1”, “firebase”: “^3.0.0”

[erichiggins]

I think I found the issue. I had installed ember-simple-auth, which is no longer needed and causes this to break. Removing this npm package allowed everything to work as expected.

[thedig]

I tried doing this with explicitly injecting the session, to which it complained there was no such service.

Also all examples of how to use Torii I found imply that session is already implicitly injected. Please see: https://www.danielgynn.com/third-party-auth-in-ember-with-firebase/