If you want to login to your Invision Community as Oauth Server, you can simply do it using our Joomla OAuth Server plugin. Once you configure the Invision Community with Joomla OAuth Server plugin, you can login to your Invision Community as Oauth Server application using Joomla credentials. It also allows you to send custom user attributes to your Invision Community site as per your requirements. To know more about other features we provide in Joomla OAuth Server plugin, you can click here .