How do I create a googleads yaml file for python googleads lib?

im trying to use get functions for reports under googleads.

#My code

from googleads import adwords from googleads import errors import time import datetime import os import sys if __name__ == '__main__':   ## initialize google adwords client object   adwords_client = adwords.AdWordsClient.LoadFromStorage("googleAds.yaml")   ## set your customer-ID   adwords_client.SetClientCustomerId('389204095687-xx.apps.googleusercontent.com')   report_downloader = adwords_client.GetReportDownloader(version='v9')   ## get CLICK_PERFORMANCE report for yesterday as an example   report_date = datetime.datetime.now()-datetime.timedelta(days=1)   report_date_string = report_date.strftime("%Y%m%d")   ## build the report query   report_query = (adwords.ReportQueryBuilder()       .Select('campaign.id','ad_group.id', 'metrics.impressions', 'metrics.clicks')       .From('ad_group')       .During(start_date=report_date_string,end_date=report_date_string)       .Build())   ## download the report as CSV into string   csv_report = report_downloader.DownloadReportWithAwql(       report_query, 'CSV', skip_report_header=True,       skip_column_header=True, skip_report_summary=True,       include_zero_impressions=False)    

But i receive the below traceback error-

   with open(path, 'rb') as handle: FileNotFoundError: [Errno 2] No such file or directory: 'googleAds.yaml' During handling of the above exception, another exception occurred: Traceback (most recent call last):   File "<ipython-input-5-d90ad0259074>", line 16, in <module>     adwords_client = adwords.AdWordsClient.LoadFromStorage("googleAds.yaml")   File "C:\Users\jj\AppData\Local\Continuum\anaconda3\lib\site-packages\googleads\adwords.py", line 193, in LoadFromStorage     cls._OPTIONAL_INIT_VALUES))   File "C:\Users\jj\AppData\Local\Continuum\anaconda3\lib\site-packages\googleads\common.py", line 247, in LoadFromStorage     'Given yaml file, %s, could not be opened.' % path) GoogleAdsValueError: Given yaml file, googleAds.yaml, could not be opened. 

I reviewed the documentation for Oath: https://github.com/googleads/googleads-python-lib/wiki/API-access-using-own-credentials-(installed-application-flow)#step-2---setting-up-the-client-library

but I already have all the credentials, i just dont know how to create the yml file and save it where python can detect it