Supply PaperTrail with current user

app/controllers/admin/base_controller.rb

@@ -14,7 +14,7 @@ module Admin
     end
 
     def user_for_paper_trail
-      current_admin_user.present? ? current_admin_user.id_role_username : 'public'
+      current_admin_user ? current_admin_user.id_role_username : 'guest'
     end
   end
 end

app/controllers/admin/sessions_controller.rb

@@ -31,5 +31,9 @@ module Admin
     def after_sign_out_path_for(resource_or_scope)
       new_admin_user_session_path
     end
+
+    def user_for_paper_trail
+      current_admin_user ? current_admin_user.id_role_username : 'guest'
+    end
   end
 end

app/controllers/registrar/base_controller.rb

@@ -36,7 +36,7 @@ class Registrar
     end
 
     def user_for_paper_trail
-      current_registrar_user.present? ? current_registrar_user.id_role_username : 'public'
+      current_registrar_user ? current_registrar_user.id_role_username : 'guest'
     end
   end
 end

app/controllers/registrar/sessions_controller.rb

@@ -178,5 +178,9 @@ class Registrar
     def after_sign_out_path_for(resource_or_scope)
       new_registrar_user_session_path
     end
+
+    def user_for_paper_trail
+      current_registrar_user ? current_registrar_user.id_role_username : 'guest'
+    end
   end
 end