I have an existing, mostly JavaScript-based experiment program that I think I’ll soon be modifying to run with Prolific. I wanted to ask, for the purpose of setting my database schema, what format can I expect PROLIFIC_PID, STUDY_ID, and SESSION_ID to be in? The example given in the documentation is https://test.com?PROLIFIC_PID=5a9d64f5f6dfdd0001eaa73d, which suggests that the PID at least is always an integer in hexadecimal, but I don’t want to assume.