get_encrypted_app_ticket() function needs userdata, what is it?

[AivinXJ]

[AshladBP]

UP ! I have the same problem

[rossengeorgiev]

userdata is data the game wants encrypted in the ticket, and which can be verified by server, by decrypting the ticket.

https://partner.steamgames.com/doc/features/auth#encryptedapptickets