Help with Appen pin

I'm trying to complete task 205. This is my first time using appen and for the life of me I can't figure out what to enter for the pin. It says PIN: Create your PIN in the format of MME[Appen Global ID][Child ID] (example: MME12345Child1).

What do I put in the spot where they have the numbers 12345.

I've sent in 2 tickets asking this question and they just keep sending me the link for the guidelines.

Thanks in advance