Generating membership numbers for contacts

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1

Question:
Is there a way to write Velo code within an automation that generates a unique membership number for a contact when that contact is moved in a workflow or similar?

I don’t know enough about javascript and Wix to figure this out and would appreciate any help or tips, since we don’t have the budget to actually hire a programmer. I’ve tried using AI (forgive me), and while the code itself looks okay, it’s not working when I trigger the automation.

Product:
Wix Editor, Velo code in an automation

What are you trying to achieve:
My idea is that when a contact card is moved in the onboarding workflow, a unique 6-digit number is generated and either saved to the contact’s custom field, “membership number”, or at least to a collection in the Wix CMS.

What have you already tried:
I’ve looked through the velo help articles, tried Gemini, ChatGPT and Wix’s AI chatbot to write, run or debug the code (again, forgive me, but I don’t have any programmer friends). I feel like I’m missing something glaringly obvious but I just can’t figure out how it would work.

Additional information:
Example code
ChatGPT:

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2

Wix automatically generates unique IDs in the _id field, sure you need a custom implementation of it?
It shouldn’t be too hard but probably unnecessary (?)

3

Well that would probably solve the problem. Thank you!
What would be an easy way to see this ID? It doesn’t show in the contact card and I don’t want to export the members every time.