README.md in simple_auth-3.1.1 vs README.md in simple_auth-3.1.2

@@ -30,10 +30,11 @@
 # config/initializers/simple_auth.rb
 SimpleAuth.setup do |config|
   config.scopes = %i[user admin]
   config.login_url = proc { login_path }
   config.logged_url = proc { dashboard_path }
+  config.flash_message_key = :alert
 
   config.install_helpers!
 end
 ```
 
@@ -141,14 +142,28 @@
 
 ```yaml
 en:
   simple_auth:
     user:
-      need_to_be_logged_in: "You need to be logged"
+      need_to_be_logged_in: "You need to be logged in"
       not_authorized: "You don't have permission to access this page"
 ```
 
 If you don't set these translations, a default message will be used.
+
+To display the error message, use something like `<%= flash[:alert] %>`. If you
+want to use a custom key, say `:error`, use the configuration file
+`config/initializers/simple_auth.rb` to define the new key:
+
+# config/initializers/simple_auth.rb
+SimpleAuth.setup do |config|
+  # ...
+
+  config.flash_message_key = :error
+
+  # ...
+end
+```
 
 ## Maintainer
 
 * Nando Vieira (<http://nandovieira.com>)