This is probably not possible with WebSiteX5; you would have to rely on external service providers.

>> https://www.digital-affin.de/blog/mitgliederbereich-erstellen/ (in German)

Since I don't have a paid membership area myself, I can't make any recommendations for a provider.

Maybe other users have tips on this.

Hello

Probably you can do.

 create a subsription product into ecommerce part with payment.

when you receive the order, you create a login/password for this customer and give him the private page URL to access it

just my idea !