name Required. The notification channel to verify.
code Required. The verification code that was delivered to the
channel as a result of invoking the
``SendNotificationChannelVerificationCode`` API method or
that was retrieved from a verified channel via
``GetNotificationChannelVerificationCode``. For example, one
might have "G-123456" or "TKNZGhhd2EyN3I1MnRnMjRv" (in
general, one is only guaranteed that the code is valid
UTF-8; one should not make any assumptions regarding the
structure or format of the code).