Convert string to Unique Net ID

[Bojann (Bojan)]

For NonSteam, there is C++ way

.h

	TSharedPtr<const FUniqueNetId> CreateUniqueIdFromString(const FString& StringId) const;

.cpp

TSharedPtr<const FUniqueNetId> UMyClass::CreateUniqueIdFromString(const FString& StringId) const
{
	if (OnlineSubsystem)
	{
		const IOnlineIdentityPtr IdentityInterface = OnlineSubsystem->GetIdentityInterface();

		if (IdentityInterface.IsValid())
		{
			return IdentityInterface->CreateUniquePlayerId(StringId);
		}
	}
	return nullptr;
}

Online subsystem should be available using this code

IOnlineSubsystem* OnlineSubsystem= IOnlineSubsystem::Get();