Is there a server-to-server API for the purposes of user authentication? Here is an example. - Game has multiplayer functionality. - Game connects to Game Server (GS). - Instead of the GS managing user accounts with a username/password login system, Game will use GameCircle's player ID. A typical flow is the following: - Game is launched. - Player selects the multiplayer menu. - Game ensures Player is logged into GameCircle. - Game requests unique Authentication Token or Ticket from GameCircle libraries. - Game securely sends GameCircle Player ID and Authentication Token to GS. - GS validates the Player's GameCircle session by using GameCircle Player ID and Authentication Token via server-to-server API. - Upon successful response, Player is now logged into GS. This flow requires no additional account logins or passwords since it is effectively using GameCircle to log into the Game Server. If there is no back-end server-to-server authentication, using the Player ID alone is inadequate since if someone's Player ID is known, login attempts can easily be faked. Let me know if features like this are supported in GameCircle, thanks.