I would like to use the Facebook Scores API to make a social leaderboard for my iOS game. From the documentation, I saw that it would require to request a publish permission so that I could post scores. The thing is that I don't want to publish to the player's wall (I simply think it's invasive), I just want to use the API backend to store the score, but everything I saw involved posting to the user's wall in order to write the score on the backend.
How should I proceed to only write the score without posting it into facebook? If this thing exists, can I avoid requiring the publish permission?
Thanks