It's been a long time, but you *used* to be able to configure the login stuff so it would use your own database and table instead of creating a new one.
Okay...good old google:
Yes, you can (and I think should) still do this.
Looks like this is a good source of info:
An optimist sees the glass as half full.
A pessimist sees the glass as half empty.
A realist drinks it no matter how much there is.