added toggle feature

app/controllers/eis_billing/base_controller.rb

@@ -3,6 +3,7 @@ module EisBilling
     protect_from_forgery with: :null_session
     skip_authorization_check # Temporary solution
     # skip_before_action :verify_authenticity_token # Temporary solution
+    before_action :persistent
     before_action :authorized
 
     def encode_token(payload)
@@ -47,5 +48,11 @@ module EisBilling
     def logger
       @logger ||= Rails.logger
     end
+
+    def persistent
+      return true if Feature.billing_system_integrated?
+
+      render json: { message: "We don't work yet!" }, status: :unauthorized
+    end
   end
 end