Update app.py

app.py

@@ -27,8 +27,9 @@ footer {
 }
 """
 
-# Initialize OpenAI client
-client = OpenAI(api_key=os.getenv("OPENAI_API_KEY"))
+# Initialisiere OpenAI-Client mit API Key
+client = OpenAI(api_key=os.getenv("openai"))
+
 
 # Global variables
 conversation_history = []