Error when It created a trigger

[achambi]

In the test.js exists error to run in node.js:
triggers(db.users).save(function (document, next) {
//Add a 'created' date to the new user
document.created = new Date();
next();
}
);
produce:
TypeError: next is not a function
at Collection. (/home/user/dev/mongoTriggers-master/test.js:8:9)
at next (/home/user/dev/mongoTriggers-master/index.js:97:25)
at Collection.save (/home/user/dev/mongoTriggers-master/index.js:99:13)
at Collection.save (/home/user/dev/mongoTriggers-master/node_modules/mongojs/lib/collection.js:112:47)
at next (/home/user/dev/mongoTriggers-master/index.js:96:31)
at Collection. (/home/user/dev/mongoTriggers-master/test.js:8:9)
at next (/home/user/dev/mongoTriggers-master/index.js:97:25)
at Collection.save (/home/user/dev/mongoTriggers-master/index.js:99:13)
at Object. (/home/user/dev/mongoTriggers-master/test.js:12:10)
at Module._compile (module.js:570:32)