This is following up with a question that was answered by @SarahZhang. The answer works on a local computer but not when hosted by PlayFab: https://community.playfab.com/questions/44926/authentication-as-a-server-to-make-api-calls.html
I am making an Unreal racing game with dedicated servers. My idea is to have the players join a dedicated PlayFab server and RPC their Character IDs to the server. Then the server makes an API call to PlayFab for each CharacterId, receiving their character data which the server turns into custom car configurations. The server then spawns the cars and replicates to all clients.
The issue has been resolved on local computers. But the problem remains when I upload and deploy this as a PlayFab multiplayer server. When we test on PlayFab, connecting by Matchmaking, we are unable to get any of our customizations because the dedicated server cannot make API calls to get our player and character information.