Need help with authorization through Steam

[loretare]

I am unsuccessfully trying to write Python code that can authenticate on a website through Steam. I need the code to be able to log in to a third-party website using a Steam account. At the moment, my code successfully logs into the Steam account, but unfortunately, the authentication on the website does not work. I don't quite understand how the data passed in the request is encrypted because it is encoded in protobuf. The only information I could find on how Steam account authentication currently works can be found here - https://bbs.kanxue.com/thread-278709.htm, but unfortunately, it did not help me solve my problem. I hope someone can provide me with guidance on how to accomplish this.

Edited September 17, 2023 by loretare