Get custom e-mail field via SOAP

Please tell us how we can access the custom email field via SOAP or REST. The issue is:after adding this field to CRM, it becomes available in the address book module and the AOS_Contracts module, but it is not available through the SOAP service.We’ve checked the availability of a custom email field using the get_entry and get_module_fields methods, but the response did not contain any of this fields. The custom email field was created using the following articles: - and
We will be very grateful for your help!