List available country codes for phone number search.
This endpoint returns a list of country codes where phone numbers are available for purchase from the specified provider.
Args: provider: Provider to get country codes from (‘twilio’ or ‘telnyx’)
Returns: CountryCodesResponse: List of available country codes
provider (string, optional): Provider to get country codes from ("twilio" or "telnyx"). Defaults to "telnyx"200 OK status with available country codes.
success (boolean): Whether the request completed successfullycountry_codes (array of strings): List of available ISO 3166-1 alpha-2 country codesprovider (string): Provider used for the query (“twilio” or “telnyx”)Bearer authentication header of the form Bearer <token>, where <token> is your auth token.