API v5: Phone Authentication

When creating an agreement (using the POST /agreements endpoint), we can choose to use Phone Authentication.

Below is a screenshot of the request payload for PhoneInfo.

So my questions are as below:

1. What are the possible values to populate for countryCode and countryIsoCode?

2. What are the list of supported countries?

3. If I choose Phone authentication are both countryCode and countryIsoCode required? Or can I just populate either one?

PhoneInfo {

phone (string😞 The phone number required for the recipient to view and sign the document if authentication type is PHONE,

countryCode (string, optional😞 The numeric country calling code (ISD code) required for the recipient to view and sign the document if authentication type is PHONE,

countryIsoCode (string, optional😞 The country ISO Alpha-2 code required for the recipient to view and sign the document if authentication type is PHONE

}

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