'The secret parameter was not passed.', 'invalid-input-secret' => 'The secret parameter was invalid or did not exist.', 'missing-input-response' => 'The response parameter was not passed.', 'invalid-input-response' => 'The response parameter is invalid or has expired.', 'bad-request' => 'The request was rejected because it was malformed.', 'timeout-or-duplicate' => 'The response parameter has already been validated before.', 'internal-error' => 'An internal error happened while validating the response.', 'unexpected' => 'An unexpected error occurred.', ];