countryCode property
User's country code.
Required. This field must be equal to the Google Ads account's billing country. Incentive eligibility, terms of service, and reward values are often country-specific. This country code is used to ensure the selected incentive is applicable to the user. Possible country codes: https://developers.google.com/google-ads/api/data/codes-formats#country_codes
Required.
Implementation
core.String? countryCode;