How send a message with socket from library.js (server side) to file.js(client side) without uid

[Doppy]

Suppose there are two files.

library.js in the /nodebb-plugin-namePlugin
file.js in /nodebb-plugin-namePlugin/static/lib

Now I must do a lot of operation in my library.js and I must check when user is created. So I use the hook and It's everything ok, but, after I must my check in library I need to send a message to my file.js to change background color of a component. The proble is that I used this to communicate:

websockets = module.parent.require('./socket.io'), //library.js
websockets.in('uid_' + data.uid).emit('hash', {
				'username': data.data.username
	
	});     
 //file.js
socket.on('hash',function(){
				console.log("DOG);
			});  

The problem is that I don't have data.uid value because I'm checking before that an user can registrate himself. Anyone can help me to use websocket without uid or can suggest me other methods?