Retrieves data about the instance of your app that's installed on a Wix site and data about the site itself. For example, to check whether the Wix user has installed a free or paid version of your app, or to check which apps made by Wix are installed on the site.
You must authenticate this method as a Wix app.
To retrieve site.ownerInfo in the response, you must
have the READ SITE OWNER EMAIL permission scope in addition to
MANAGE YOUR APP.
This method doesn't return any custom errors, but may return standard errors. Learn more about standard Wix errors.