docs: def email_message(self):
          """ compose complete email message text """
          url = settings.SITE_URL
          hello_text = __("Hi %s," % self.to_user.get_full_name())
          action_text = __("\n\nMore details here: %s") % url
          explain_text = __(
              "This is an automatic notification sent from from %s.\n"
              "If you want to stop receiving this notification edit your"
              "email notification settings here: %s") % (settings.SITE_NAME, 'TODO')
  
          return "%s\n\n%s%s\n\n%s" % (hello_text, self.text, action_text, explain_text)