[TArray](API\Runtime\Core\Containers\TArray)< [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< const [IOnlineTournamentMatchDetails](API\Plugins\OnlineSubsystem\Interfaces\IOnlineTournamentMatchDetails) > > GetMatchDetails ( const FUniqueNetIdRef UserId, const [TArray](API\Runtime\Core\Containers\TArray)< [FOnlineTournamentMatchIdRef](API\Plugins\OnlineSubsystem\Interfaces\FOnlineTournamentMatchIdRef) > & MatchIds ) const