Pull and update the current state from the API.

def update_state_from_api(self):
        """
        Pull and update the current state from the API.
        """
        if self.last_api_call is not None:
            difference = (datetime.datetime.now() - self.last_api_call).seconds
        else:
            # This is the first run, so we need to get the lastest state.
            difference = 301
        if difference >= 300:
            url = BASE_URL + "/rest/item"
            payload = {'usertoken': self.token}
            arequest = requests.get(url, params=payload)
            status = str(arequest.status_code)
            if status == '401':
                _LOGGER.info("Token expired? Trying to get a new one.")
                self.authenticate(True)
                arequest = requests.get(url, params=payload)
                status = arequest.status_code
            elif status == '404':
                _LOGGER.error("No devices associated with this account.")
            elif status != '200':
                _LOGGER.error("API error not updating state. " + status)
            else:
                self.state = arequest.json()
            self.last_api_call = datetime.datetime.now()
            _LOGGER.info("Pulled latest state from API.")