Fix bug: User cannot connect using the orbit button (Devise configuration)

config/initializers/devise.rb

@@ -21,7 +21,7 @@ Devise.setup do |config|
   # parameters are used only when authenticating and not when retrieving from
   # session. If you need permissions, you should implement that in a before filter.
   # config.authentication_keys = [ :email ]
-  config.authentication_keys = [ :nccu_ldap_uid ]
+  config.authentication_keys = [ :email ]
   
 
   # Tell if authentication through request.params is enabled. True by default.