def add_moderator container, user, subreddit
      friend_wrapper container: container, name: user, r: subreddit, type: "moderator"
    end
def add_moderator container, user, subreddit
      friend_wrapper container: container, name: user, r: subreddit, type: "moderator"
    end
Add a moderator to the subreddit

 @param container [String] The subreddit id. Must be a subreddit id (begins with t5_)
 @param user [String] The user
 @param (see #delete_header)
 @return (see #clear_sessions)