Saving and checking Session ID

[mishav]

I think this post answers the question, for a user not logged in:

Session variables

Hello, As soon as a Bubble web app is opened, a user is created in the database, and it’s using the cookie to represent him/her, until he signs up. So if you modify the current user that isn’t logged in, it’ll modify that object in the db (the 3 days are revolving)