code: def superuser_required(view_func):
      
      @wraps(view_func)
      def _checklogin(request, *args, **kwargs):
          if request.user.is_active and request.user.is_superuser:
              # The user is valid. Continue to the admin page.
              return view_func(request, *args, **kwargs)
  
          assert hasattr(request, 'session'), "The Django admin requires session middleware to be installed. Edit your MIDDLEWARE_CLASSES setting to insert 'django.contrib.sessions.middleware.SessionMiddleware'."
          defaults = {
              'template_name': 'admin/login.html',
              'redirect_field_name': request.get_full_path(),
              'authentication_form': AdminAuthenticationForm,
              'extra_context': {
                  'title': _('Log in'),
                  'app_path': request.get_full_path()
                  }
              }
          return LoginView(request, **defaults)
      return _checklogin
docs: Decorator for views that checks that the user is logged in and is a staff
      member, displaying the login page if necessary.