How to authorize on the site through Steam(OpenId) for further sending requests to this site?

Question

Parsing

It appeared that it was necessary to send a request to the site using the python requests library, but in the process I ran into a problem (information restrictions for unauthorized users)
Authorization can be performed using:
1) Phone number
2) Steam account

I chose the second item, searching for information on the Internet I found a library steam is just for such authorization:
( https://steam.readthedocs.io/en/stable/api/steam.w... )
But nothing came of the way, I used the above library, as well as requests