How to link the program to the site?

Question

Python

Hello. Help deal with the issue. There is a program and a website. It is necessary that when registering in the program, using the same password and login, you can also enter the site. And vice versa. I think to do this: when registering in the program, the password and login will be sent to the site and saved there. When you try to authorize the entered data will be compared with those on the site, and on the site as well. The only question is how to do it? If someone helps to do it, tells me how or just gives a link where you can read about it - I will be very grateful)) Programming language - Python.

Answer 1

OAuth
OAuth2 python server
The site should not store the password. Only its hash for verification.

Answer 2

Look towards using API KEY. You allow each distributed API KEY to create / bind one user. The program asks the user for a name and password, pulls the server for registration / binding, at least with a simple post, at least write down a special api.
The further fate of API KEY is up to you. For example, it can be used in the password recovery procedure as an additional authorization token.