diff --git a/app/controllers/users/base_account_controller.rb b/app/controllers/users/base_account_controller.rb
index b693eaab5..29de52b26 100644
--- a/app/controllers/users/base_account_controller.rb
+++ b/app/controllers/users/base_account_controller.rb
@@ -4,4 +4,12 @@ class Users::BaseAccountController < Users::BaseController
   def observed_user
     @_observed_user ||= (User.find_by_id(params[:account_id]) || User.find_by_login(params[:account_id]))
   end
+
+  private
+
+  def require_login
+    return if User.current.logged?
+
+    tip_exception(401, "..")
+  end
 end