Steps to reproduce:
add rule to link accounts with same email address
sign up with user account (oauth or database)
sign up again with another method, and same email address.
Rule executes and returns original user after linking.
Now there are two users listed with that email address in the dashboard.
The original shows that the linking was successful; trying to navigate to the secondary account shows “User Not Found” error.
Running the api to query for all users, shows the ‘ghosted’ one.
Trying to delete or query for that ghosted secondary user returns 404.