I have created a bunq Account a few times, but I h...

I have created a bunq Account a few times, but I have no idea how to add my account Number because once I have proven with my ID card that it is me, bunq indicates that they will hear something from them within 24 hours.
But if I am no longer on the App for half an hour, it automatically logs out and I can no longer log in.
What am I doing wrong?