Refactor user function and call_nvidia_api function

app.py

@@ -26,7 +26,6 @@ def user(message, history):
     history = history or []
     history.append({"role": "user", "content": message})
     return history
-
 def call_nvidia_api(history):
     # Preparar o payload com o histórico de chat formatado
     payload = {
@@ -36,10 +35,10 @@ def call_nvidia_api(history):
         "max_tokens": 500,
         "seed": 42,
         "stream": False 
-    
+    } 
+
     session = requests.Session()
     response = session.post(INVOKE_URL, headers=headers, json=payload)
-    
     # Novo método de polling para verificar o status da resposta
     while response.status_code == 202:
         request_id = response.headers.get("NVCF-REQID")