[TArray](API\Runtime\Core\Containers\TArray)< [FOnlineTournamentMatchIdRef](API\Plugins\OnlineSubsystem\Interfaces\FOnlineTournamentMatchIdRef) > GetMatchList ( const FUniqueNetIdRef UserId, const [FOnlineTournamentIdRef](API\Plugins\OnlineSubsystem\Interfaces\FOnlineTournamentIdRef) TournamentId ) const