void QueryParticipantList ( const FUniqueNetIdRef UserId, const [FOnlineTournamentIdRef](API\Plugins\OnlineSubsystem\Interfaces\FOnlineTournamentIdRef) TournamentId, const [FOnlineTournamentParticipantQueryFilter](API\Plugins\OnlineSubsystem\Interfaces\FOnlineTournamentParticipantQuer-) & QueryFilter, const [FOnlineTournamentQueryParticipantListComplete](API\Plugins\OnlineSubsystem\Interfaces\FOnlineTournamen-_2) & Delegate )