You could generate a unique key for each visitor as a sandbox user and then give the prompt to convert to a full account once the user has started interacting w

You could generate a unique key for each visitor as a sandbox user and then give the prompt to convert to a full account once the user has started interacting with the site. Be sure to make it non-intrusive though. See how they have done it on https://hollyapp.com/ https://hollyapp.com/ It took me a while to find that link again, but I thought it was worth it as an example. Good luck.