Is it possible to create a Online Subsystem in a plugin?

Development Programming & Scripting
1

Is it possible to create plugin that defines an OSS? There was problems trying to load it. The plugin is loaded and initialized, but it isn’t being called.

CreateSession() is supposed to be a function in the custom OSS defined in
[OnlineSubsystem]
DefaultPlatformService=Rest
, but it’s not working.

bool ALobbyGameSession::HostSession(int32 ControllerId, FName SessionName, const FString & GameType, bool bIsLAN, bool bIsPresence, int32 MaxNumPlayers)
{
	IOnlineSubsystem* const OnlineSub = IOnlineSubsystem::Get();
	if (OnlineSub)
	{
		CurrentSessionParams.SessionName = SessionName;
		CurrentSessionParams.bIsLAN = bIsLAN;
		CurrentSessionParams.bIsPresence = bIsPresence;
		CurrentSessionParams.ControllerId = ControllerId;
		MaxPlayers = MaxNumPlayers;

		IOnlineSessionPtr Sessions = OnlineSub->GetSessionInterface();
		if (Sessions.IsValid())
		{
			HostSettings = MakeShareable(new FLobbyOnlineSessionSettings(bIsLAN, bIsPresence, MaxPlayers));
			HostSettings->Set(SETTING_GAMEMODE, GameType, EOnlineDataAdvertisementType::ViaOnlineService);
			HostSettings->Set(SETTING_MATCHING_HOPPER, FString("TeamDeathmatch"), EOnlineDataAdvertisementType::DontAdvertise);
			HostSettings->Set(SETTING_MATCHING_TIMEOUT, 120.0f, EOnlineDataAdvertisementType::ViaOnlineService);
			HostSettings->Set(SETTING_SESSION_TEMPLATE_NAME, FString("GameSession"), EOnlineDataAdvertisementType::DontAdvertise);

			Sessions->AddOnCreateSessionCompleteDelegate(OnCreateSessionCompleteDelegate);
			return Sessions->CreateSession(CurrentSessionParams.ControllerId, CurrentSessionParams.SessionName, *HostSettings);
		}
	}
	return false;
}