Login authentification

I’m using the plugin from oa-social-login for my users.
How to handle that they don’t have to make a new login for using the comments?
I’m looking for 1 login. Than they can use it for all. Also for Discus.
Can you inform me how to do?
Many regards,
Peter

https://ww.wp.xz.cn/plugins/disqus-comment-system/