WLTR3565'S PROFILE

I'm wondering how to make a game profile to be managable by 2 users or more... I'm pretty lost how to do this :(

Specifically, the other user doesn't have to be able to control all of them, but at the very least they can post blogs in the game profile as a developer too. I've listed a friend as one of the users in the game profile, but he said that he can't post any blog there. He's been wanting to post a blog in one of our game's profile... Is there any way?