Environment Config vars in an Ember globals app

authenticator.js

App.SimpleAuthCredentialsAuthenticator = SimpleAuth.Authenticators.Base.extend({
    setup: function () {
      console.log(this.get('config'));  // undefined
      this.set('serverTokenEndpoint', this.get('config.api_servertokenendpoint')) // throws EX and poops out
    }.on('init')
});

config-initializer.js

Ember.Application.initializer({
    name: 'config',
    after: 'ember-simple-auth-initializer',
    initialize: function(container, application) {
        var envTag = $('meta[name="env-name"]');
        var environment;

        if (!envTag) {
            throw new Ember.Error("No config environment present in index.html.");
        }

        environment = $(envTag).attr('value');

        var app_environment = environment,
            api_serverTokenEndpoint,
            api_host,
            api_namespace,
            pubnub_subscribeKey,
            pubnub_publishKey,
            pubnub_uuid,
            pubnub_enable_ssl;

        if (environment === 'development') {
            // API
            api_servertokenendpoint = 'http://localhost:64499/auth/credentials';
            api_host = 'http://localhost:64499';
            api_namespace = '';

            // more config stuff (3rd party API Keys, etc...)
            // ...
            // ...
        }

        if (environment === 'test') {
            // API
            api_servertokenendpoint = 'http://my.test.server/auth/credentials';
            api_host = 'http://my.test.server';
            api_namespace = 'api_test';
            
            // more config stuff (3rd party API Keys, etc...)
            // ...
            // ...
        }

        if (environment === 'production') {
            // API
            api_servertokenendpoint = 'https://my.prod.server/auth/credentials';
            api_host = 'https://my.prod.server';
            api_namespace = 'api';

            // more config stuff (3rd party API Keys, etc...)
            // ...
            // ...

        }

        if (Ember.empty(api_host)) {
            throw new Ember.Error("No config found for environment `" + environment + "`. ENV-NAME should be `development`, `test`, or `production`.");
        }

        var config = Ember.Object.extend({
            // environment
            app_environment: app_environment,

            // api endpoints
            api_servertokenendpoint: api_serverTokenEndpoint,
            api_host: api_host,
            api_namespace: api_namespace
        });

        application.register('config:main', config, { singleton: true, instantiate: true });    // works
        application.inject('controller', 'config', 'config:main');                              // works
        application.inject('adapter', 'config', 'config:main');                                 // works 
        application.inject('service', 'config', 'config:main');                                 // works
        application.inject('authenticator', 'config', 'config:main');                           // BIG GIANT WTF IT DOESN'T WORK
        application.inject('authorizer', 'config', 'config:main');                              // BIG GIANT WTF IT DOESN'T WORK
    }
});