Forum plugin or autologin


i need to integrate a forum into OCS/OJS but I think there is not a forum plugin, right?

So, the second option is: install a forum in my hosting and insert a link to it inside OCS/OJS web, so when it is clicked, the forum is opened with the same credentials the user has in OCS/OJS. Is this possible in some way? Or is it mandatory the user to login into forum?


Sorry for my english,