AngularJs response time - angularjs

Question

I've got a factory that's fired with every request to receive the employee:
firstname;
companyid;
employeeid;
The factory looks like this:
(function()
{
angular.module('employeeApp').factory('authenticationFactory', authenticationFactory);
function authenticationFactory($cookieStore,$cookies,requestFactory,$location,GLOBALS,constants)
{
var factory = {};
factory.valid
ateUser = function()
{
var vm = this;
vm.firstname = constants.firstname;
vm.companyid = constants.companyid;
vm.companyid = constants.employeeid;
if($location.path() != '/')
{
var api_token = factory.getToken();
factory.isValidToken(api_token).then(function(response) {
if (response.status != 200) {
$location.path('/');
}
data = {"api_token": api_token};
requestFactory.post(GLOBALS.url + 'show/employee/' + $cookies.get('employeeid'), data)
.then(function (response) {
vm.firstname = response.data.result.Employee.FirstName;
vm.companyid = response.data.result.Employee.CompanyId;
vm.employeeid = response.data.result.Employee.EmployeeId;
}, function () {
$location.path('/');
});
});
}
}
When I want to show employees from a company I've got this url:
domain.com/show/employees/{companyid}
This is my controller for showing all companies:
(function()
{
angular.module('employeeApp').controller('homeController', homeController);
function homeController(employeeFactory,$cookieStore,$location,constants) {
var vm = this;
vm.employees = {};
vm.constants = constants;
vm.showEmployees = function()
{
employeeFactory.getEmployees(vm.constants.companyid)
.then(function(response)
{
vm.employees = response;
}),
function(){
$location.path('/');
};
}
vm.showEmployees();
The problem is that the response of the authenticationFactory is being fired after the homeControllerso the result is that vm.constants.companyid in my homeController is empty.
angular.js:11500 POST http://domain.dev/api/v1/show/employees/undefined 404 (Not Found)
How could I fix this?
Thankyou.