public override object Authenticate(DevExpress.ExpressApp.ObjectSpace objectSpace)
{
if (logonParameters.Employee == null)
{
throw new ArgumentNullException("User");
}
if (!logonParameters.Employee.ComparePassword(logonParameters.Password))
{
throw new AuthenticationException(logonParameters.Employee.UserName, "Wrong password");
}
return objectSpace.GetObject(logonParameters.Employee);
}