code: func (o *OAuthSession) MySubreddits() ([]*Subreddit, error) {
  	type Response struct {
  		Data struct {
  			Children []struct {
  				Data *Subreddit
  			}
  		}
  	}
  	r := new(Response)
  	err := o.getBody("https://oauth.reddit.com/subreddits/mine/subscriber", r)
  	if err != nil {
  		return nil, err
  	}
  	s := make([]*Subreddit, len(r.Data.Children))
  	for i, child := range r.Data.Children {
  		s[i] = child.Data
  	}
  	return s, nil
  }
docs: // MySubreddits fetchs subreddits the current user subscribes to.
  // TODO support other endpoints https://www.reddit.com/dev/api/#GET_subreddits_mine_{where}