fix generator problem. allow no auth

app/controllers/merged/merged_controller.rb

@@ -1,6 +1,11 @@
 module Merged
   class MergedController < ::ApplicationController
-    before_action :authenticate_member!
+    before_action :authenticate_if
     layout "merged/application"
+
+    def authenticate_if
+      return unless respond_to? :"authenticate_member!"
+      authenticate_member!
+    end
   end
 end