/**
* Verify a JWT that was signed with your own certificates.
*
* @param $id_token string The JWT token
* @param $cert_location array of certificates
* @param $audience string the expected consumer of the token
* @param $issuer string the expected issuer, defaults to Google
* @param [$max_expiry] the max lifetime of a token, defaults to MAX_TOKEN_LIFETIME_SECS
* @return mixed token information if valid, false if not
*/
public function verifySignedJwt($id_token, $cert_location, $audience, $issuer, $max_expiry = null)
{
$auth = new OAuth2($this);
$certs = $auth->retrieveCertsFromLocation($cert_location);
return $auth->verifySignedJwtWithCerts($id_token, $certs, $audience, $issuer, $max_expiry);
}