human
I wrote the below code

    import pywink
    from pubnubsubhandler import PubNubSubscriptionHandler
    if (hass.data.get(DOMAIN) is None):
        hass.data[DOMAIN] = {'unique_ids': [], 'entities': {}, 'oauth': {}, 'configuring': {}, 'pubnub': None, 'configurator': False}
    def _get_wink_token_from_web():
        _email = hass.data[DOMAIN]['oauth']['email']
        _password = hass.data[DOMAIN]['oauth']['password']
        payload = {'username': _email, 'password': _password}
        token_response = requests.post(CONF_TOKEN_URL, data=payload)
        try:
            token = token_response.text.split(':')[1].split()[0].rstrip('<br')
        except IndexError:
            _LOGGER.error('Error    getting    token.    Please    check    email/password.')
            return False
        pywink.set_bearer_token(token)
    if (config.get(DOMAIN) is not None):
        client_id = config[DOMAIN].get(ATTR_CLIENT_ID)
        client_secret = config[DOMAIN].get(ATTR_CLIENT_SECRET)
        email = config[DOMAIN].get(CONF_EMAIL)
        password = config[DOMAIN].get(CONF_PASSWORD)
        local_control = config[DOMAIN].get(CONF_LOCAL_CONTROL)
    else:
        client_id = None
        client_secret = None
        email = None
        password = None
        local_control = None
        hass.data[DOMAIN]['configurator'] = True
    if (None not in [client_id, client_secret]):
        _LOGGER.info('Using    legacy    oauth    authentication')
        if (not local_control):
            pywink.disable_local_control()
        hass.data[DOMAIN]['oauth']['client_id'] = client_id
        hass.data[DOMAIN]['oauth']['client_secret'] = client_secret
        hass.data[DOMAIN]['oauth']['email'] = email
        hass.data[DOMAIN]['oauth']['password'] = password
        pywink.legacy_set_wink_credentials(email, password, client_id, client_secret)
    elif (None not in [email, password]):
        _LOGGER.info('Using    web    form    authentication')
        pywink.disable_local_control()
        hass.data[DOMAIN]['oauth']['email'] = email
       ...

What's a good function header?
assistant
#Here's a good function header.

def setup(hass, config):