code: def verify_id_token(id_token, audience, http=None,
                      cert_uri=ID_TOKEN_VERIFICATION_CERTS):
      
      _require_crypto_or_die()
      if http is None:
          http = transport.get_cached_http()
  
      resp, content = transport.request(http, cert_uri)
      if resp.status == http_client.OK:
          certs = json.loads(_helpers._from_bytes(content))
          return crypt.verify_signed_jwt_with_certs(id_token, certs, audience)
      else:
          raise VerifyJwtTokenError('Status code: {0}'.format(resp.status))
docs: Verifies a signed JWT id_token.
  
      This function requires PyOpenSSL and because of that it does not work on
      App Engine.
  
      Args:
          id_token: string, A Signed JWT.
          audience: string, The audience 'aud' that the token should be for.
          http: httplib2.Http, instance to use to make the HTTP request. Callers
                should supply an instance that has caching enabled.
          cert_uri: string, URI of the certificates in JSON format to
                    verify the JWT against.
  
      Returns:
          The deserialized JSON in the JWT.
  
      Raises:
          oauth2client.crypt.AppIdentityError: if the JWT fails to verify.
          CryptoUnavailableError: if no crypto library is available.