Best way to integrate ghost authentication with the authentication of my website

It’s the first time we use Ghost in the company where I work. What we want to achieve is to have information about our users about the functions of a website that we already have in production.

Today we have users who authenticate directly on our website, our product. We also want our users authenticated in our application to see the content of Ghost, which will be the best way to go?.

What we did so far, is to install Ghost on a local server and associate it with a domain of ours as well.

To have more context, our website has its own authentication and we want to integrate it in some way into the ghost so that only our users who are in a database so we can see the content.

Any Ideas?

Up on this. I would like to do the same thing. Is it possible today?