title: Integrating 3D Secure into Payius payment system
body: <p>Is there anyone familiar with Payius payment system?</p>
  
  <p>I have integrated the system in one website and now I have to add 3DS step. The only documentation I found (<a href="http://payius.com/media/pdf/Payius-Merchant-Integration-Giude.pdf" rel="nofollow">http://payius.com/media/pdf/Payius-Merchant-Integration-Giude.pdf</a>) 
  says I need to redirect the user to url <code>https:///merchant/mpi</code> which will perform a get request to the referrer as a callback. Now as I understand for testing purposes the url should be <a href="https://testpayments.payius.com/merchant/mpi" rel="nofollow">https://testpayments.payius.com/merchant/mpi</a> right? In any case both bring up en error.</p>
  
  <p>Did I get the documentation right?</p>