Actually, this wasn't defined

app.py

@@ -29,7 +29,6 @@ async def convert(req: Request):
     theme = req.query_params.get("theme")
     r = await client.get(
         url,
-        headers={"Authorization": f"Bearer {os.environ.get('HF_TOKEN')}"},
         follow_redirects=True,
         # httpx no follow redirect by default
     )