use User.isAdmin instead

src/user.js

@@ -317,13 +317,11 @@ var utils = require('./../public/src/utils.js'),
 				return callback(err, null);
 			}
 
-			Groups.getGidFromName('Administrators', function(err, gid) {
-
 			function iterator(uid, callback) {
 				User.getUserData(uid, function(err, userData) {
-						Groups.isMember(uid, gid, function(err, isMember) {
+					User.isAdministrator(uid, function(isAdmin) {
 						if (userData) {
-								userData.administrator = isMember;
+							userData.administrator = isAdmin?"1":"0";
 							data.push(userData);
 						}
 						callback(null);
@@ -335,7 +333,7 @@ var utils = require('./../public/src/utils.js'),
 				callback(err, data);
 			});
 		});
-		});
+
 	}
 
 	User.createGravatarURLFromEmail = function(email) {