i am writing my own ranking system. i don't want to force users to enter some user name or log into facebook. Name is not very important, i just need to get some unique identifier so that i can distinguish one's score from others. I could get device id using https://marketplace.yoyogames.com/assets/977/deviceid-for-ios-and-android however i don't know if it is ok to store device id in my database. I probably could hash it from my web endpoint but i don't even want to send the device id over the wire. Is there a way to generate guid in GML? Or a way to hash a value?