try id = user && !_.isEmpty(user.get()) && user.get()[0].id , see https://github.com/lefnire/habitrpg/issues/7

Conflicts:
	lib/server/auth.js
	src/server/auth.coffee

lib/server/auth.js

@@ -1,5 +1,5 @@
 // Generated by CoffeeScript 1.3.3
-var content, derby, req, schema;
+var content, derby, req, schema, _;
 
 derby = require('derby');
 
@@ -7,6 +7,8 @@ schema = require('../app/schema');
 
 content = require('../app/content');
 
+_ = require('lodash');
+
 req = void 0;
 
 module.exports.setRequest = function(r) {
@@ -41,7 +43,7 @@ module.exports.setupEveryauth = function(everyauth) {
     q = model.query('users').withEveryauth('facebook', fbUserMetadata.id);
     model.fetch(q, function(err, user) {
       var id;
-      id = user && user.get().length > 0 && user.get()[0].id;
+      id = user && !_.isEmpty(user.get()) && user.get()[0].id;
       console.log({
         err: err,
         id: id,

src/server/auth.coffee

@@ -1,6 +1,7 @@
 derby = require('derby')
 schema = require('../app/schema')
 content = require('../app/content')
+_ = require('lodash')
 
 # Need this for later use by EveryAuth in the MiddleWare
 req = undefined
@@ -49,7 +50,7 @@ module.exports.setupEveryauth = (everyauth) ->
       model = req.getModel()
       q = model.query('users').withEveryauth('facebook', fbUserMetadata.id)
       model.fetch q, (err, user) ->
-        id = user && user.get().length>0 && user.get()[0].id
+        id = user && !_.isEmpty(user.get()) && user.get()[0].id
         console.log {err:err, id:id, fbUserMetadata:fbUserMetadata}
         # Has user been tied to facebook account already?
         if (id && id!=session.userId)