add secret to client_secret setting

config/settings.yml

@@ -7,6 +7,7 @@ auth0:
     shadowed_by_global: true
   auth0_client_secret:
     default: ''
+    secret: true
     shadowed_by_global: true
   auth0_callback_url:
     default: ''

plugin.rb

@@ -1,6 +1,6 @@
 # name: mozilla-iam
 # about: A plugin to integrate Discourse with Mozilla's Identity and Access Management (IAM) system
-# version: 1.6.3
+# version: 1.6.4
 # authors: Leo McArdle
 # url: https://github.com/mozilla/discourse-mozilla-iam