"This API is deprecated." When fetching a db with no id.

[Ashton Kinslow]

When fetching a Database with an empty ID I get a misleading error "This API is deprecated.".

	client := notionapi.NewClient(notionapi.Token("mytoken"))

	db, err := client.Database.Get(context.TODO(), notionapi.DatabaseID(""))
	if err != nil {
		panic(err.Error())
	}

panic: This API is deprecated.