Add onboarding information to user serializer

app/serializers/user_serializer.rb

@@ -8,7 +8,7 @@ class UserSerializer < ActiveModel::Serializer
 
   attributes :services, :account, :profile, :va_profile, :veteran_status,
              :in_progress_forms, :prefills_available, :vet360_contact_information,
-             :session
+             :session, :onboarding
 
   def id
     nil
@@ -23,4 +23,5 @@ def id
   delegate :prefills_available, to: :object
   delegate :services, to: :object
   delegate :session, to: :object
+  delegate :onboarding, to: :object
 end

app/services/users/profile.rb

@@ -54,6 +54,7 @@ def fetch_and_serialize_profile
       scaffold.prefills_available = prefills_available
       scaffold.services = services
       scaffold.session = session_data
+      scaffold.onboarding = onboarding if Flipper.enabled?(:veteran_onboarding_beta_flow, @user)
     end
 
     def account
@@ -215,5 +216,11 @@ def session_data
         transactionid: @session[:ssoe_transactionid]
       }
     end
+
+    def onboarding
+      {
+        show: user.show_onboarding_flow_on_login
+      }
+    end
   end
 end

app/services/users/scaffold.rb

@@ -9,7 +9,8 @@ module Users
   #
   # rubocop:disable Style/StructInheritance
   class Scaffold < Struct.new(:errors, :status, :services, :account, :profile, :va_profile, :veteran_status,
-                              :in_progress_forms, :prefills_available, :vet360_contact_information, :session)
+                              :in_progress_forms, :prefills_available, :vet360_contact_information, :session,
+                              :onboarding)
   end
   # rubocop:enable Style/StructInheritance
 end

spec/controllers/v0/users_controller_spec.rb

@@ -78,6 +78,26 @@
       expect(claims).to be(nil)
     end
 
+    context 'onboarding' do
+      it 'returns a JSON user with onboarding information when the feature toggle is enabled' do
+        Flipper.enable(:veteran_onboarding_beta_flow, user)
+        get :show
+        json = json_body_for(response)
+        expect(response).to be_successful
+        onboarding = json.dig('attributes', 'onboarding')
+        expect(onboarding['show']).to be(true)
+      end
+
+      it 'returns a JSON user without onboarding information when the feature toggle is disabled' do
+        Flipper.disable(:veteran_onboarding_beta_flow)
+        get :show
+        json = json_body_for(response)
+        expect(response).to be_successful
+        onboarding = json.dig('attributes', 'onboarding')
+        expect(onboarding).to be(nil)
+      end
+    end
+
     context 'when profile claims enabled' do
       before do
         Flipper.enable(:profile_user_claims)