This belongs in custom data.

templates/base.html

@@ -440,7 +440,6 @@
     var intercomSettings = {
       app_id: 'bde5yvi6',
       user_id: {{ request.user.id }},
-      username: '{{ request.user.username }}',
       user_hash: '{{ request.user.id|intercom_sha_256 }}',
       email: '{{ request.user.email }}',
       created_at: {{ request.user.date_joined|date:"U" }},
@@ -450,6 +449,7 @@
         'is pro': window.user_is_pro,
         'blog domain': '{{ request.user.profile.blog_domain }}',
         'pro date': {% firstof request.user.profile.pro_date|date:"U" 'null' %},
+        'username': '{{ request.user.username }}'
       }
     };
   </script>