It is logical, that if you use vBulletin user table to store your website user account, it'd better if you managed to use vBulletin's auth system also. I wish it was an option for me. In case if that is not possible, have look in this thread: https://vborg.vbsupport.ru/showthrea...t=82836&page=7 and especially at my last experience. I've just accomplished the similar task, although I wish it was somehow more elegant or something. So if you can use vBulletin's auth and db system, then use it.