Open your dashboard, under the settings box click "Cincopa Options", enter your AFC code and click update.
Get your AFC code from here http://www.cincopa.com/cincopaManager/affiliates.aspx
From now on each user the will register to Cincopa that origin in your site will be associated with your affiliate code. You can track your registered users and status here http://www.cincopa.com/affiliate/report.aspx
Note : You'll probably want to test that the new registered users are associated with you, in that case make sure to clear your browser's cookies before each registration. If you'll not do that the new test accounts will be associated with a blank AFC remembered from your first personal registration.