docs: def _get_password(params):
          """Get the password for a database connection from :mod:`keyring`
  
          Args:
              params (dict): database configuration, as defined in :mod:`ozelot.config`
  
          Returns:
              str: password
          """
          user_name = params['user']
          service_name = params['host'] + ':' + params['driver']
          return keyring.get_password(service_name=service_name,
                                      username=user_name)