GoToWebinar Integration with external platform

I'm a developer of SugarCRM company. I want to integrate GoToWebinar into our platform. I've created an OAuth Client in the developer center to start requesting the webinar platform.

• Is it enough for integration?
• Would any GoTo account be possible to integrate?
• Do I need to set up a specific integration app in GoTo Marketplace (like Hubspot)? If so, how to do it?