CustomField

The fields a user can access to customize personalization variables

Name	Type	Description
slug	string	The unique name of the custom field
title	string	A human-friendly title for the custom field
type	string	“The type of field this is. Can be one of the following: date email number telephone text time url calendar_day” Field Types and formats: [date: ISO 8601 format, i.e. YYYY-MM-DD], [email: Must include a local-part and a domain], [number: Numeric types such as integers or floats], [telephone: E.164 format], [text: String type between 1 and 70 characters], [time: ISO 8601 local time format, i.e. YYYY-MM-DDTHH:MM:SS], [url: Must include protocol (HTTP/HTTPS) and hostname], [calendar_day: Yearless ISO 8601 format, i.e. –MM-DD],
description	string	A description of what this field is meant for
createdAt	DateTime	When the field was created
inUse	boolean	Whether or not the field is currently being used by a user