added documentation note about requesting permission for email from facebook

diff --git a/README.rst b/README.rst
index fd361c3db99651ac885b03ca721ce6670792a460..28db1f60309119aea0381f14888370a08f3593fd 100644 (file)
--- a/README.rst
+++ b/README.rst
@@ -684,9 +684,11 @@ at `Facebook development resources`_:
       FACEBOOK_APP_ID
       FACEBOOK_API_SECRET
 
-- also it's possible to define extra permissions with::
+- Define ``FACEBOOK_EXTENDED_PERMISSIONS`` to get extra permissions from facebook.
+  NOTE: to get users' email addresses, you must request the 'email' permission::
+
+     FACEBOOK_EXTENDED_PERMISSIONS = ['email']
 
-     FACEBOOK_EXTENDED_PERMISSIONS = [...]
 
 - Define ``FACEBOOK_PROFILE_EXTRA_PARAMS`` to pass extra parameters to
   https://graph.facebook.com/me when gathering the user profile data, like::