Hi all, is it any role management in ktor? Something like in Spring @hasRole or @preauthorized?

I do not believe so (this could have changed in a recent release), but it's not too difficult to bootstrap one. I ended up writing a custom route selector that returns

RouteSelectorEvaluation.Constant

if the user has the role and

RouteSelectorEvaluation.Failed

otherwise. You could do a similar thing with interception. See: https://ktor.io/servers/features/routing.html The Interception heading particularly talks about verifying admin privileges.