Retrieving / Getting the current user id in a remote method in strongloop's loopback framework.

SampleModel.js

var loopback = require('loopback');

module.exports = function(SampleModel) {
  
  // Returns null if the access token is not valid
   function getCurrentUserId() {
    var ctx = loopback.getCurrentContext();
    var accessToken = ctx && ctx.get('accessToken');
    var userId = accessToken && accessToken.userId;
    return userId;
  }
  
  
  SampleModel.testRemoteMethod = function(cb){
    var userId = getCurrentUserId();
    if(!userId){
      // Code if valid access token not found
    }else{
      // Code for authenticated users.
    }
  }
  
  // Define testRemoteMethod as a remote method also
  
}