From eed414b62aec2ff3cca6160328a7c3f4acf18ed3 Mon Sep 17 00:00:00 2001
From: Ryan Kelly <rfkelly@mozilla.com>
Date: Wed, 18 Nov 2015 10:20:08 +1100
Subject: [PATCH] chore(tokens): add a comment about why we're inserting an
 empty string for email

---
 lib/routes/token.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/routes/token.js b/lib/routes/token.js
index c73307e70..ae43d40fb 100644
--- a/lib/routes/token.js
+++ b/lib/routes/token.js
@@ -270,6 +270,10 @@ function confirmJwt(params) {
       throw AppError.invalidAssertion();
     }
 
+    // We can't know the email based on a service token,
+    // so we can't cache it locally.  Insert an empty string
+    // for now, while we complete the process of entirely
+    // removing the 'email' column from our database.
     return {
       clientId: client.id,
       userId: uid,