def METHOD_NAME(self, path: str = None) -> List[str]:
    """Returns a list of files on the remote system.
    Args:
        path (str, optional): full path to the remote directory to list. Defaults to None.
    Returns:
        List: List of files.
    """
    if path is None:
        files = self.conn.listdir()
    else:
        files = self.conn.listdir(path)
    return files