Update app.py

app.py

@@ -26,7 +26,7 @@ def get_ephemeral_key():
     url = "https://api.openai.com/v1/realtime/sessions"
     headers = {
         "Authorization": f"Bearer {OPENAI_API_KEY}",
-        "Content-Type": "application/json"
+        "Content-Type": "application/json",
     }
     body = {
         "model": "gpt-4o-realtime-preview",
@@ -36,8 +36,11 @@ def get_ephemeral_key():
         res = requests.post(url, headers=headers, json=body)
         res.raise_for_status()
         data = res.json()
-        # Return only the ephemeral key string
-        return {"ephemeral_key": data["client_secret"]["value"]}
+        # Make sure this key exists
+        ephemeral_key = data.get("client_secret", {}).get("value")
+        if not ephemeral_key:
+            return {"error": "Failed to get ephemeral key"}
+        return {"ephemeral_key": ephemeral_key}
     except requests.exceptions.RequestException as e:
         return {"error": f"Failed to generate ephemeral key: {e}"}