Return the path to the user s-tui config directory

def get_user_config_file():
    """
    Return the path to the user s-tui config directory
    """
    user_home = os.getenv('XDG_CONFIG_HOME')
    if user_home is None or not user_home:
        config_path = os.path.expanduser(os.path.join('~', '.config',
                                                      's-tui', 's-tui.conf'))
    else:
        config_path = os.path.join(user_home, 's-tui', 's-tui.conf')

    return config_path