MeanSocket.register(function(app, auth, database, http) {

    var io = require('./server/config/socketio')(http);
    MeanSocket.io = io;

    //We enable routing. By default the Package Object is passed to the routes
    MeanSocket.routes(io);

    return MeanSocket;
});

MeanSocket.register(function(app, auth, database, http, doesntExist) {
    ...

Error: dependency 'doesntExist' was not registered
    at get (/public/dryCleaning/node_modules/dependable/index.js:115:15)

module.exports = function(MeanSocket, io, doesntExist) {
...