Change Username

Hello,

I am using WordPress & Woocommerce and would like to learn how to make sure the most updated user email address is used by intercom.io.

Am I correct in saying that when a user registers on my WordPress site they will be automatically be added as a user on intercom.io with the email address they used to register?

AND, when/ if they change their email address in the My Account page of my site? Will their email address by changed in Intercom.io?

I am worried that with my other intercom.io integrations through zapier, things will get very tricky if the user changes their email address!!

Thanks for any help you can offer.