src/OpenPlatform/AuthorizerAccessToken.php
protected function renewAccessToken()
    {
        $token = $this->authorizer->getApi()
            ->getAuthorizerToken(
                $this->authorizer->getAppId(),
                $this->authorizer->getRefreshToken()
            );

        $this->authorizer->setAccessToken($token['authorizer_access_token'], $token['expires_in'] - 1500);

        return $token['authorizer_access_token'];
    }
protected function renewAccessToken()
    {
        $token = $this->authorizer->getApi()
            ->getAuthorizerToken(
                $this->authorizer->getAppId(),
                $this->authorizer->getRefreshToken()
            );

        $this->authorizer->setAccessToken($token['authorizer_access_token'], $token['expires_in'] - 1500);

        return $token['authorizer_access_token'];
    }
Refresh authorizer access token.

@return string