code: func (c *Conn) CreateCategory(name string) (*Category, error) {
  	var out struct {
  		Category *Category
  	}
  	if err := c.do("smugmug.categories.create", &out, "Name", name); err != nil {
  		return nil, err
  	}
  	return out.Category, nil
  }
docs: // CreateCategory creates a category with the given name.