I guess URL needs to be exposed with high visibility so that the programs know how to access it.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@3089 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/java/hudson/model/User.java

@@ -86,7 +86,7 @@ public class User extends AbstractModelObject {
     /**
      * The URL of the user page.
      */
-    @Exposed
+    @Exposed(visibility=999)
     public String getAbsoluteUrl() {
         return Stapler.getCurrentRequest().getRootPath()+'/'+getUrl();
     }