send in the entire registration form for userData

src/routes/authentication.js

@@ -84,11 +84,13 @@
 			return res.send(403);
 		}
 		
-		var userData = {
+		var userData = {};
-			username: req.body.username,
+
-			password: req.body.password,
+		for (var key in req.body) {
-			email: req.body.email
+			if (req.body.hasOwnProperty(key)) {
-		};
+				userData[key] = req.body[key];
+			}
+		}
 
 		plugins.fireHook('filter:register.check', req, res, userData, function(err, req, res, userData) {
 			if (err) {