single login for xenforo and vbulletin


New member
i'm currently runing large community of vbulletin 3.8.4 with so many customized mods and i like xenforo products, i would like to have both forums running at the sametimes with different modifications but wondering is there i can make both vbulletin and xenforo with single login for users? so that ways i would still able to keep my vbulletin with my customized mods and running new comunity on xenforo?

thank you