tweak(net): more verbose errors for Steam auth

Fixes !32.

code/components/citizen-server-impl/src/SteamIdentityProvider.cpp

@@ -88,15 +88,19 @@ static InitFunction initFunction([]()
 				return;
 			}
 
+			HttpRequestOptions opts;
+			opts.addErrorBody = true;
+
 			httpClient->DoGetRequest(
 				fmt::format("https://api.steampowered.com/ISteamUserAuth/AuthenticateUserTicket/v1/?key={0}&appid={1}&ticket={2}", g_steamApiKey->GetValue(), STEAM_APPID, it->second),
-				[this, cb, clientPtr](bool result, const char* data, size_t size)
+				opts,
+				[this, cb, clientPtr](bool success, const char* data, size_t size)
 				{
 					std::string response{ data, size };
 
 					try
 					{
-						if (result)
+						if (success)
 						{
 							json object = json::parse(response)["response"];
 
@@ -112,6 +116,10 @@ static InitFunction initFunction([]()
 						else
 						{
 							trace("Steam authentication for %s^7 failed: %s\n", clientPtr->GetName(), response);
+							if (response.find("<pre>key=</pre>") != std::string::npos)
+							{
+								trace("^2Your Steam Web API key may be invalid. This can happen if you've changed your Steam password, Steam Guard details or changed/reverted your server's .cfg file. Please re-register a key on ^4https://steamcommunity.com/dev/apikey^2 and insert it in your server startup file.^7\n");
+							}
 						}
 
 						cb({});

code/components/glue/src/ConnectToNative.cpp

@@ -459,21 +459,47 @@ static InitFunction initFunction([] ()
 			g_connected = false;
 		});
 
-		netLibrary->OnConnectionError.Connect([] (const char* error)
+		netLibrary->OnConnectionError.Connect([] (const char* errorStr)
 		{
+			std::string error(errorStr);
 #ifdef GTA_FIVE
-			if (strstr(error, "This server requires a different game build"))
+			if (strstr(error.c_str(), "This server requires a different game build"))
 			{
 				RestartGameToOtherBuild();
 			}
 #endif
 
+			if (strstr(error.c_str(), "steam") || strstr(error.c_str(), "Steam"))
+			{
+				if (auto steam = GetSteam())
+				{
+					if (steam->IsSteamRunning())
+					{
+						if (IClientEngine* steamClient = steam->GetPrivateClient())
+						{
+							InterfaceMapper steamUser(steamClient->GetIClientUser(steam->GetHSteamUser(), steam->GetHSteamPipe(), "CLIENTUSER_INTERFACE_VERSION001"));
+
+							if (steamUser.IsValid())
+							{
+								uint64_t steamID = 0;
+								steamUser.Invoke<void>("GetSteamID", &steamID);
+
+								if ((steamID & 0xFFFFFFFF00000000) != 0)
+								{
+									error += "\nThis is a Steam authentication failure, but you are running Steam and it is signed in. The server owner can find more information in their server console.";
+								}
+							}
+						}
+					}
+				}
+			}
+
 			console::Printf("no_console", "OnConnectionError: %s\n", error);
 
 			g_connected = false;
 
 			rapidjson::Document document;
-			document.SetString(error, document.GetAllocator());
+			document.SetString(error.c_str(), document.GetAllocator());
 
 			rapidjson::StringBuffer sbuffer;
 			rapidjson::Writer<rapidjson::StringBuffer> writer(sbuffer);
@@ -482,7 +508,7 @@ static InitFunction initFunction([] ()
 
 			nui::PostFrameMessage("mpMenu", fmt::sprintf(R"({ "type": "connectFailed", "message": %s })", sbuffer.GetString()));
 
-			ep.Call("connectionError", std::string(error));
+			ep.Call("connectionError", error);
 		});
 
 		netLibrary->OnConnectionProgress.Connect([] (const std::string& message, int progress, int totalProgress)