func (b *Book) SetCreatorAnonymous() {
	b.CreatedBy = ""
	b.CreatedByID = "anonymous"
}
SetCreatorAnonymous sets the CreatedByID field to the "anonymous" ID.
package bookshelf
import "context"
type Book struct {
	ID            int64
	Title         string
	Author        string
	PublishedDate string
	ImageURL      string
	Description   string
	CreatedBy     string
	CreatedByID   string
}
func (b *Book) CreatedByDisplayName() string {
	if b.CreatedByID == "anonymous" {
		return "Anonymous"
	}
	return b.CreatedBy
}