Common Login For PHPBB3 and OSC

Hello Bidders, Here are the project details, We need the logins, sessions and personal information to be shared between the two so When a user logs into phpBB, they are logged into oscommerce OR when a user logs into oscommerce, they are logged into phpbb the same needs to happen when they log out of either application. additionally, when a user or admin modifies login data in one application, it needs to be modified in the other (mainly email, username, password, Full Name) If any queries please feel free to ask.