Update app.py

app.py

@@ -18,7 +18,10 @@ client = InferenceClient("HuggingFaceH4/zephyr-7b-beta")
 class Harold:
 
     def __init__(self):
-        self.openai_client = OpenAI(api_key=os.getenv("OPENAI_API_KEY"))
+        try:
+            self.openai_client = OpenAI(api_key=os.getenv("OPENAI_API_KEY"))
+        except Exception:
+            self.openai_client = None
         self.name = "Harold"
         reader = PdfReader("data/Living-Playbook.pdf")
         self.text = ""