Hi Mark,
Thanks for your reply, but this is not what I'm looking for. I'll try to explain in another way.
Let's suppose that I look at my list of users (components > easyblog > users) and I find that the last registered user occupies ID 178, and I notice that 10 spammers have signed up and I decide to delete them. In theory, the next available user ID would be 169 (178 - 10 +1). In practice, the next user to sign up will be with ID 179, because there is a record counter somewhere that I can't find. Continuing with my example, I want to locate that ID counter to reduce it from 178 to 168, so that the next user to sign up will be 169.
I know that the individual user records are registered in the database easyblog_users, but I can't find where the last ID is kept.