fix(cloud): cross-client enabling without proper validation (#1531)

src/Vencord.ts

@@ -27,6 +27,7 @@ export { PlainSettings, Settings };
 import "./utils/quickCss";
 import "./webpack/patchWebpack";
 
+import { get as dsGet } from "./api/DataStore";
 import { showNotification } from "./api/Notifications";
 import { PlainSettings, Settings } from "./api/Settings";
 import { patches, PMLogger, startAllPlugins } from "./plugins";
@@ -38,6 +39,22 @@ import { onceReady } from "./webpack";
 import { SettingsRouter } from "./webpack/common";
 
 async function syncSettings() {
+    // pre-check for local shared settings
+    if (
+        Settings.cloud.authenticated &&
+        await dsGet("Vencord_cloudSecret") === null // this has been enabled due to local settings share or some other bug
+    ) {
+        // show a notification letting them know and tell them how to fix it
+        showNotification({
+            title: "Cloud Integrations",
+            body: "We've noticed you have cloud integrations enabled in another client! Due to limitations, you will " +
+                "need to re-authenticate to continue using them. Click here to go to the settings page to do so!",
+            color: "var(--yellow-360)",
+            onClick: () => SettingsRouter.open("VencordCloud")
+        });
+        return;
+    }
+
     if (
         Settings.cloud.settingsSync && // if it's enabled
         Settings.cloud.authenticated // if cloud integrations are enabled