How to use the adal.util.create_request_options function in adal

def get_user_code_info(self, oauth_parameters):
        device_code_url = self._create_device_code_url()
        url_encoded_code_request = urlencode(oauth_parameters)

        post_options = util.create_request_options(self, _REQ_OPTION)
        operation = "Get Device Code"
        try:
            resp = requests.post(device_code_url.geturl(), 
                                 data=url_encoded_code_request, 
                                 headers=post_options['headers'],
                                 verify=self._call_context.get('verify_ssl', None),
                                 proxies=self._call_context.get('proxies', None),
                                 timeout=self._call_context.get('timeout', None))
            util.log_return_correlation_id(self._log, operation, resp)
        except Exception:
            self._log.exception("%(operation)s request failed", {"operation": operation})
            raise

        if util.is_http_success(resp.status_code):
            user_code_info = self._handle_get_device_code_response(resp.text)
            user_code_info['correlation_id'] = resp.headers.get('client-request-id')

def get_token_with_polling(self, oauth_parameters, refresh_internal, expires_in):
        token_url = self._create_token_url()
        url_encoded_code_request = urlencode(oauth_parameters)

        post_options = util.create_request_options(self, _REQ_OPTION)

        operation = "Get token with device code"

        max_times_for_retry = math.floor(expires_in/refresh_internal)
        for _ in range(int(max_times_for_retry)):
            if self._cancel_polling_request:
                raise AdalError('Polling_Request_Cancelled')

            resp = requests.post(
                token_url.geturl(), 
                data=url_encoded_code_request, headers=post_options['headers'],
                proxies=self._call_context.get('proxies', None),
                verify=self._call_context.get('verify_ssl', None))
            if resp.status_code == 429:
                resp.raise_for_status()  # Will raise requests.exceptions.HTTPError

def discover(self):

        options = util.create_request_options(self, {'headers': {'Accept':'application/json'}})
        user_realm_url = self._get_user_realm_url()
        self._log.debug("Performing user realm discovery at: %(user_realm_url)s",
                        {"user_realm_url": user_realm_url.geturl()})

        operation = 'User Realm Discovery'
        resp = requests.get(user_realm_url.geturl(), headers=options['headers'],
                            proxies=self._call_context.get('proxies', None),
                            verify=self._call_context.get('verify_ssl', None))
        util.log_return_correlation_id(self._log, operation, resp)

        if resp.status_code == 429:
            resp.raise_for_status()  # Will raise requests.exceptions.HTTPError
        if not util.is_http_success(resp.status_code):
            return_error_string = u"{} request returned http error: {}".format(operation, 
                                                                               resp.status_code)
            error_response = ""

def get_token(self, oauth_parameters):
        token_url = self._create_token_url()
        url_encoded_token_request = urlencode(oauth_parameters)
        post_options = util.create_request_options(self, _REQ_OPTION)

        operation = "Get Token"

        try:
            resp = requests.post(token_url.geturl(), 
                                 data=url_encoded_token_request, 
                                 headers=post_options['headers'],
                                 verify=self._call_context.get('verify_ssl', None),
                                 proxies=self._call_context.get('proxies', None),
                                 timeout=self._call_context.get('timeout', None))

            util.log_return_correlation_id(self._log, operation, resp)
        except Exception:
            self._log.exception("%(operation)s request failed", {"operation": operation})
            raise