def get_login_user_name(login_soup):
    """
    return user's korean name
    :param login_soup:
    self.soup_jar['login_soup']
    :return:
    """
    name_span = login_soup.find('span', {'class': 'fontS01'})
    if name_span is None:
        return 'fail'
    return name_span.text
