You get just an undefined or unresolved externals? For both cases, try including **“ThirdParty/Steamworks/Steamv132/sdk/public/steam/steam_api.h” **in your main game header file or somewhere else. Also make sure you added Steamworks to the build rules, so your build file should look something like this:
public class Steam : ModuleRules
{
public Steam(TargetInfo Target)
{
PublicDependencyModuleNames.AddRange(new string] { "Core", "CoreUObject", "Engine", "InputCore" });
//Steam stuff here
PublicDependencyModuleNames.AddRange(new string] {
"OnlineSubsystem",
"OnlineSubsystemUtils",
"Steamworks"
});
DynamicallyLoadedModuleNames.Add("OnlineSubsystemSteam");
PrivateDependencyModuleNames.AddRange(new string] { });