Authenticate on lesson title fetch

lib/notifications/submission.js

@@ -1,6 +1,7 @@
 'use babel'
 
 import path from 'path'
+import token from '../token'
 import fetch from '../fetch'
 import {learnCo} from '../config'
 
@@ -12,7 +13,10 @@ function getLessonTitle(lessonID) {
 
   if (title != null) { return Promise.resolve(title) }
 
-  return fetch(`${learnCo}/api/v1/lessons/${lessonID}`).then(({title}) => {
+  var lessonEndpoint = `${learnCo}/api/v1/lessons/${lessonID}`;
+  var headers = new Headers({'Authorization': `Bearer ${token.get()}`});
+
+  return fetch(lessonEndpoint, {headers}).then(({title}) => {
     cachedLessonTitles[lessonID] = title || 'Learn IDE';
     return title;
   });