无法获取Parse.com PFUser数据?

I have a UITableView that is populated with games that a user is currently playing. I have a Pointer column in the Game table called Turn that points to a PFUser in the User table. Instead of setting the cell text to the objectID of the Turn value, I'd like to instead set it to the player's first name, which is stored in the User table.I have a UITableView that is populated with gam