code: function(callback) {
  			var self = this;
  			var userService = this.serviceRegistry.getService("orion.core.user"); 
  			var authServices = this.serviceRegistry.getServiceReferences("orion.core.auth");
  			var authService = this.serviceRegistry.getService(authServices[0]);
  			authService.getUser().then(function(jsonData) {
  				userService.getUserInfo(contextPath + jsonData.Location).then(function(accountData) {
  					var username = accountData.UserName;
  					self.clientDisplayedName = accountData.FullName || username;
  					var MASK = 0xFFFFFF + 1;
  					var MAGIC = 161803398 / 2 % MASK;
  					self.clientId = username + '.' + guid.substr(0, 4);
  					callback();
  				}, function(err) {
  					console.error(err);
  				});
  			});
  		}
docs: Initialize client name and id
  @param {function} callback