Does authservice only works for SPA app or can work for server side calls from client?

[nkpun]

Given that authservice client security is based on cookie, I assume we can only use authservice for SPA/ Client Side Rendering applications?

Or does it also work for server side rendering applications such as asp.net MVC where authservice call will be made from serverside asp.net code. If does work, how AuthService going to set the client cookies?