Logon an User programatically

Hello,

i want to achieve within KM-Coding to get a resource with the context of a different user, than the one logged in. Step one is create an IUser user then:

ctx.setUser(user);
res = ResourceFactory.getInstance().getResource(rid, ctx);

The problem is that for some properties i need an authenticated IUser object. Is there a way to achieve this within KM?

regards,

Marco