Add proper error checking of ICE servers from Twilio

src/streamlit_app.py

@@ -2,6 +2,7 @@ import os
 import sys
 import asyncio
 import tempfile
+import traceback
 
 from dotenv import load_dotenv
 from twilio.rest import Client
@@ -9,7 +10,6 @@ from twilio.rest import Client
 load_dotenv()
 account_sid = os.getenv("TWILIO_SID")
 auth_token = os.getenv("TWILIO_TOKEN")
-twilio_client = Client(account_sid, auth_token)
 
 os.environ["HOME"] = "/tmp"
 os.environ["STREAMLIT_HOME"] = "/tmp"
@@ -29,6 +29,19 @@ from PIL import Image
 
 import streamlit as st
 from streamlit_webrtc import VideoProcessorBase, webrtc_streamer, RTCConfiguration
+if account_sid and auth_token:
+    try:
+        twilio_client = Client(account_sid, auth_token)
+        token = twilio_client.tokens.create()
+        ICE_SERVERS = token.ice_servers
+        st.success("✅ Using Twilio TURN/STUN servers")
+    except Exception as e:
+        ICE_SERVERS = [{"urls": ["stun:stun.l.google.com:19302"]}]
+        st.error(f"❌ Failed to get ICE servers from Twilio: {e}")
+        st.text(traceback.format_exc())
+else:
+    st.warning("⚠️ Twilio credentials not set. Falling back to STUN-only.")
+    
 
 import matplotlib.pyplot as plt
 from huggingface_hub import hf_hub_download
@@ -47,13 +60,6 @@ if gpus:
 from nets import get_model_from_name
 from utils.utils import (cvtColor, get_classes, letterbox_image, preprocess_input)
 
-try:
-    token = twilio_client.tokens.create()
-    ICE_SERVERS = token.ice_servers
-except Exception as e:
-    st.error(f"Failed to get ICE servers from Twilio: {e}")
-    ICE_SERVERS = [{"urls": ["stun:stun.l.google.com:19302"]}]
-
 
 # --- Classification class (merged from classification.py) ---
 cache_dir = os.path.join(tempfile.gettempdir(), "hf_cache")