REST-API - Search for the connected persons of an email-address

Hi everyone,

we are developing a Test-REST-Api-App to connect Zendesk-"Users" and CRM-Persons. Zendesk Users are identified Via the E-Mail-Adress and therefore need to Search for the Person with the current Mail-Adress.
We are able to identify the "email" Dataset by using the following Statement:
cloud.na.sagecrm.com/.../Email eq '[email protected]'

Getting the correct emai_emailid, we want to look up the Persons that are connected to this Mail-Address/ID (and Display the details). We were hoping that it would work with something like this, but it doesn't:
cloud.na.sagecrm.com/.../Person

We have also tried to look up the Mailaddress for a person, but haven't been able to do so (sth. like this):
cloud.na.sagecrm.com/.../Email

As it seems, we would need the "emaillink" Table to be added to the API, or has anyone been able to achieve something similar to this?
I would be glad to get any help. If you've got any questions feel free to ask.

Thanks,

Lennart