A GAME PAGE TO BE MANAGED BY 2 OR MORE USERS

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?

Oh yes, now he can! Thanks!

I positioned him as Other... So it doesn't work, huh?