code: def dump_database(id):
      
  
      tmp_dir = tempfile.mkdtemp()
      current_dir = os.getcwd()
      os.chdir(tmp_dir)
  
      FNULL = open(os.devnull, "w")
      heroku_app = HerokuApp(dallinger_uid=id, output=FNULL)
      heroku_app.backup_capture()
      heroku_app.backup_download()
  
      for filename in os.listdir(tmp_dir):
          if filename.startswith("latest.dump"):
              os.rename(filename, "database.dump")
  
      os.chdir(current_dir)
  
      return os.path.join(tmp_dir, "database.dump")
docs: Dump the database to a temporary directory.