Search Customers by Email

I'm using the API on to to link customers to their respective companies after registering on our company website. To make it easier for the customer I'm linking them to their CompanyID based on the customer's verified email. Currently, the API only supports searching the customer list for "Customer Name" and "Customer Notes". In order to circumvent this, I've had to paste the customer's email(s) into the note fields and search them for emails. It would be easier and more logical if we could search the customer list by emails. Is this something Zoho could implement?

Method name

http://invoice.zoho.com/api/view/search/customers/

API description

Search for a customer by passing either "Customer Name" or "Customer Notes". Only active customers will be listed.

Thanks,

Miles