Originally Posted by
Wilko Pali Sedef
I can confirm the above, I had to scan my boarding pass to receive a piece of paper with my personal log on details.
One can still use TK / ISTANBUL2017 also, which is on the good ol' white notes littered all over the lounge.
As a side note The personal user/pass one receives is a random password, but username is prefix+PNR. I guess the prefix is randomized somehow, otherwise I don't know how they deal with multiple persons on the same PNR.