Integrate rodauth helpers to grape app

app.rb

@@ -2,7 +2,29 @@ class API < Grape::API
   format :json
   prefix :api
 
+  helpers do
+    def rodauth
+      env['rodauth']
+    end
+
+    def authenticate!
+      error!('401 Unauthorized', 401) unless authenticated?
+    end
+
+    def authenticated?
+      rodauth.authenticated?
+    end
+  end
+
   get :hello do
     { hello: 'world' }
   end
+
+  namespace :private do
+    before { authenticate! }
+
+    get :hello do
+      { hello: 'world' }
+    end
+  end
 end

auth.rb

@@ -17,8 +17,7 @@ class Auth < Roda
   end
 
   route do |r|
+    env['rodauth'] = rodauth
     r.rodauth
-
-    rodauth.require_authentication
   end
 end