Throw json data properly

src/utils/oauth2.ts

@@ -105,8 +105,15 @@ export class DiscordOAuth2 {
 
     if (res.status < 200 || res.status >= 300) {
       console.error(`Non 200 code while joining user: ${options.userId} to discord:`);
-      console.log(await res.text());
-      return null;
+      const text = await res.text();
+      console.error(text);
+      let data = null;
+
+      try {
+        data = JSON.parse(text);
+      } catch { }
+
+      throw data;
     }
 
     return await res.json();