Super simple example initializer for ember-cli, injected to all routes.

registration-manager.js

import Ember from 'ember';

var RegistrationManager = Ember.Object.extend({
  signup: function(email, password) {
    console.log('Register:', email, password);
  }
});

export default {
  name: 'registration',
  initialize: function(container, app) {
    app.register('reg:main', RegistrationManager);
    app.inject('route', 'reg', 'reg:main');
  }
};

/*
  Now on routes you can use this as
  this.reg.signup('user@example.com', 'abc123');
*/