[Python] Authenticate with Windows Credentials in Python

I am working on developing an API call which needs to authenticate to a proxy. I have managed to do this by explicitly entering my proxy information. Like so:

import requests

proxies = {'https': "https://userassword@proxyIPort"}

response = requests.get('www.google.com', proxies=proxies)


The question is how do I grab the credentials of the currently logged in user and then pass them to the proxy. In my research I have come across this ServerFault post - the answer wasn't helpful but there is another one by shellster which seems to work. However, I cannot make sense of his code.

I have also install requests_negotiate_sspi (docs) and attempted to leverage the HttpNegotiateAuth module as mentioned here but I cannot seem to figure it out.

Note: I am using Python 3.7 and am in Windows 7 + 10 Environment.

EDIT

This question specifies proxies, however I really need to know how this works for other domain resources, like SharePoint, User Shares, etc.

There has to be a pythonic way to accomplish this!

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