Fix signout function

Author: jasonjoh

demo/graph-tutorial/routes/auth.js

@@ -65,11 +65,11 @@ router.get('/callback',
 // </CallbackSnippet>
 
 router.get('/signout',
-  function(req, res) {
+  async function(req, res) {
     // Sign out
     if (req.session.userId) {
       // Look up the user's account in the cache
-      const accounts = req.app.locals.msalClient
+      const accounts = await req.app.locals.msalClient
         .getTokenCache()
         .getAllAccounts();
 

tutorial/04-add-aad-auth.md

@@ -84,11 +84,11 @@ In this exercise you will extend the application from the previous exercise to s
     );
 
     router.get('/signout',
-      function(req, res) {
+      async function(req, res) {
         // Sign out
         if (req.session.userId) {
           // Look up the user's account in the cache
-          const accounts = req.app.locals.msalClient
+          const accounts = await req.app.locals.msalClient
             .getTokenCache()
             .getAllAccounts();