Update app.py

app.py

@@ -46,6 +46,8 @@ async def chat(request: ChatRequest):
             return {"response": response.choices[0].message.content}
 
         if request.model_choice == "google":
+            client = genai.Client(api_key=google_api_key)
+
             messages = [
                 {"role": "user", "parts": [{"text": "I have 10 dogs"}]},
                 {"role": "model", "parts": [{"text": "Great! Dogs are fun pets."}]},