List all filenames from windows file share using python

Question

Can someone guide me on how to list all filenames in a windows shared folder using python. Connecting to this network drive requires a username and password. Which python libraries do I need?

I'm assuming I need something like:

import os

files = []
with open(r"\\12.xxx.xx.123\files",'r') as ff:
    # r = root, d = directories, f = files
    for r, d, f in os.walk(path):
        for file in f:
            print("element f = " + f)
            files.append(os.path.join(r, file))

if my path requires a username and password, how can I pass those credentials to get a successful connection. Currently, I am getting permission denied.

Thanks.