Here's the documentation for passing a user identifier to Hotjar: https://help.hotjar.com/hc/en-us/articles/360033640653-Identify-API-Reference#handling_user_i

Here's the documentation for passing a user identifier to Hotjar: https://help.hotjar.com/hc/en-us/articles/360033640653-Identify-API-Reference#handling_user_ids https://help.hotjar.com/hc/en-us/articles/360033640653-Ident... This is a bit better than it used to be. At one point the documentation had a field for User Email Address, and only a footnote in some documentation suggested it be hashed. Still, for a company that chooses to use the feature, the session recording can be tied back to the user account and any data already associated with it.