SSO and multiple discourse apps

  1. One of the instances needs to be the SSO server for the other(s)?
  2. Would the significance of this be that the Discord users are saved only in the instance that acts as the SSO server, and provide authentication for the other Discourse instance(s)?
  3. How would the login flows be in the server instance and the other instance?

Sorry for all these questions =/ Thanks for helping me understand this!