Calling this endpoint allows you to search for a person at Extole using either the email address, partner user ID (i.e., YOUR unique identifier for this person), last name, or person keys defined by the client (e.g., partner conversion ID, partner shipment ID, etc.). The result is an array as sometimes Extole will create multiple profiles for the same person, such as the instance where the same email address may be tied to multiple partner user IDs or multiple persons matched the client person keys that were passed in the query.