How to allow third party login?

Hi

I’m using Umbraco 13 with all updates installed.

I would like to allow users to login to my website to access Umbraco pages and carry out certain processes only once they have logged in.

I can’t use the built-in membership service as they already have their own login system (I’m not sure what’s it called at present).

How could I integrate this third-party login system so when a user uses their own username and password if allows them to login to the site?

Appreciate any pointers anyone can give.


This is a companion discussion topic for the original entry at https://our.umbraco.com/forum/114040-how-to-allow-third-party-login