Rapid login attempts can create lingering/stale entries in pending authorization table.

[bwagstaff]

If users attempt to sign in before previous processing has completed, it is possible for multiple entries to be added to the list. The entries will remain indefinitely.

https://github.com/PlayFab/PlayFabMultiplayerUnreal/blob/d92f7103e256b24ea1d28f86f480cfecdb91cb8c/Source/Private/OnlineIdentityInterfacePlayFab.cpp#L409

Our change is to add:

const FString& userId = LocalUser->GetPlatformUserId();
if (!UsersToAuth.Contains(userId))
{
    UsersToAuth.Add(userId);
}

[nassosterz-ms]

Thank you for reporting this. The change looks good to me, I will pass it on to the people who are actively working in this codebase!

[yuehanlin]

Hello, the change looks good to me as well, and we will include the fix in future releases. I am going to close this issue, and please feel free to reopen if you have any concerns.