How to use the aiounifi.Controller function in aiounifi

async def get_controller(hass, host, username, password, port, site, verify_ssl):
    """Create a controller object and verify authentication."""
    sslcontext = None

    if verify_ssl:
        session = aiohttp_client.async_get_clientsession(hass)
        if isinstance(verify_ssl, str):
            sslcontext = ssl.create_default_context(cafile=verify_ssl)
    else:
        session = aiohttp_client.async_create_clientsession(
            hass, verify_ssl=verify_ssl, cookie_jar=CookieJar(unsafe=True)
        )

    controller = aiounifi.Controller(
        host,
        username=username,
        password=password,
        port=port,
        site=site,
        websession=session,
        sslcontext=sslcontext,
    )

    try:
        with async_timeout.timeout(10):
            await controller.login()
        return controller

    except aiounifi.Unauthorized:
        LOGGER.warning("Connected to UniFi at %s but not registered.", host)