Returns an apparently legit user-agent, if not requested one of a specific
    style. Defaults to a Chrome-style User-Agent.

def user_agent(style=None) -> _UserAgent:
    """Returns an apparently legit user-agent, if not requested one of a specific
    style. Defaults to a Chrome-style User-Agent.
    """
    global useragent
    if (not useragent) and style:
        useragent = UserAgent()

    return useragent[style] if style else DEFAULT_USER_AGENT