phone:
String -
The unique phone number ([E.164 format](https://en.wikipedia.org/wiki/E.164)) for this customer.
Attempting to assign the same phone number to multiple customers returns an error. The property can be
set using different formats, but each format must represent a number that can be dialed from anywhere
in the world. The following formats are all valid:
- 6135551212
- +16135551212
- (613)555-1212
- +1 613-555-1212
tags:
String -
Tags that the shop owner has attached to the customer. A customer can have up to 250 tags. Each tag can have up to 255 characters.
taxExempt:
Boolean -
Whether the customer is exempt from paying taxes on their order. If `true`, then taxes won't be applied to an order at checkout. If `false`, then taxes will be applied at checkout.