Added some localization

config/initializers/devise.rb

@@ -23,7 +23,7 @@ Devise.setup do |config|
   # session. If you need permissions, you should implement that in a before filter.
   # You can also supply a hash where the value is a boolean determining whether
   # or not authentication should be aborted when the value is not present.
-  # config.authentication_keys = [ :email ]
+  config.authentication_keys = [ :username ]
 
   # Configure parameters from the request object used for authentication. Each entry
   # given should be a request method and it will automatically be passed to the