public ActionResult SignIn(int id)
{
var employee = EmployeeServices.GetUser(id);
if (employee == null)
{
throw new ArgumentException(string.Format("No employee found with an id = {0}", id));
}
SecurityServices.SignIn(employee, base.LocationId);
var employees = InvoiceServices.GetSignedInEmployees(base.LocationId, forceRefresh: true);
return(PartialView("_AvailableEmployees", employees));
}