setting is being ignored - Use script to generate username - Azure AD

[GeeksGoneBad]

Hello!

I am trying to change the username that gets set when logging in through Azure AD - but no matter what I put in the script, or what setting I have for the "use script for username" nothing changes in my username - I've even added extra log entries to the script and they are never output to the log - telling me that the script is completely being ignored

log("warning", "Before Script");
log("warning", JSON.stringify(context));
context.userName = "jjjj" + uuid();
log("warning", "After Script");

any ideas?