If you haven’t received your PIN code yet, please wait a few more minutes, it could be delayed. Also check your spam folder. You can resend the PIN code from the app, by pressing "send a new code". If you still have trouble receiving the code after 30 minutes, ask for new one at firstname.lastname@example.org.
NOTE: The confirmation PIN code is sent in a new e-mail, after you entered your e-mail adress in the application.