Get Contacts by Emails

**This endpoint allows you to retrieve up to 100 contacts matching the searched `email` address(es), including any `alternate_emails`.** Email addresses are unique to a contact, meaning this endpoint can treat an email address as a primary key to search by. The contact object associated with the address, whether it is their `email` or one of their `alternate_emails` will be returned if matched. Email addresses in the search request do not need to match the case in which they're stored, but...