Update app.py

app.py

@@ -56,6 +56,7 @@ async def proxy_request(request: Request):
     if 'key' in query_params and query_params['key'] == use_token:
         
         # private API doesn't handle token
+        query_params = dict(query_params)
         query_params.pop('key')
         # Encode the parameters for the new URL
         encoded_params = urlencode(query_params)