add Rememerable#after_remembered callback

lib/devise/models/rememberable.rb

@@ -89,6 +89,19 @@ def rememberable_options
         self.class.rememberable_options
       end
 
+      # A callback initiated after successfully being remembered. This can be
+      # used to insert your own logic that is only run after the user is
+      # remembered.
+      #
+      # Example:
+      #
+      #   def after_remembered
+      #     self.update_attribute(:invite_code, nil)
+      #   end
+      #
+      def after_remembered
+      end
+
     protected
 
       def generate_remember_token? #:nodoc:

lib/devise/strategies/rememberable.rb

@@ -27,6 +27,7 @@ def authenticate!
         if validate(resource)
           remember_me(resource)
           extend_remember_me_period(resource)
+          resource.after_remembered
           success!(resource)
         end
       end

test/integration/rememberable_test.rb

@@ -164,4 +164,13 @@ def cookie_expires(key)
     get users_path
     assert_not warden.authenticated?(:user)
   end
+
+  test 'valid sign in calls after_remembered callback' do
+    user = create_user_and_remember
+
+    User.expects(:serialize_from_cookie).returns user
+    user.expects :after_remembered
+
+    get new_user_registration_path
+  end
 end