Fix[msa]: Avoid the issue of accounts 404-ing when attempting to log in

app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/authenticator/microsoft/MicrosoftBackgroundLogin.java

@@ -40,6 +40,7 @@ public class MicrosoftBackgroundLogin {
     private static final String xstsAuthUrl = "https://xsts.auth.xboxlive.com/xsts/authorize";
     private static final String mcLoginUrl = "https://api.minecraftservices.com/authentication/login_with_xbox";
     private static final String mcProfileUrl = "https://api.minecraftservices.com/minecraft/profile";
+    private static final String mcStoreUrl = "https://api.minecraftservices.com/entitlements/mcstore";
 
     private final boolean mIsRefresh;
     private final String mAuthCode;
@@ -81,6 +82,7 @@ public class MicrosoftBackgroundLogin {
                 notifyProgress(progressListener, 4);
                 String mcToken = acquireMinecraftToken(xsts[0], xsts[1]);
                 notifyProgress(progressListener, 5);
+                fetchOwnedItems(mcToken);
                 checkMcProfile(mcToken);
 
                 MinecraftAccount acc = MinecraftAccount.load(mcName);
@@ -255,6 +257,21 @@ public class MicrosoftBackgroundLogin {
         }
     }
 
+    private void fetchOwnedItems(String mcAccessToken) throws IOException {
+        URL url = new URL(mcStoreUrl);
+
+        HttpURLConnection conn = (HttpURLConnection)url.openConnection();
+        conn.setRequestProperty("Authorization", "Bearer " + mcAccessToken);
+        conn.setUseCaches(false);
+        conn.connect();
+        if(conn.getResponseCode() < 200 || conn.getResponseCode() >= 300) {
+            throw getResponseThrowable(conn);
+        }
+        // We don't need any data from this request, it just needs to happen in order for
+        // the MS servers to work properly. The data from this is practically useless
+        // as it does not indicate whether the user owns the game through Game Pass.
+    }
+
     private void checkMcProfile(String mcAccessToken) throws IOException, JSONException {
         URL url = new URL(mcProfileUrl);