Update app.py

app.py

@@ -187,7 +187,7 @@ class BasicAgent:
     def __call__(self, prompt: str, **kwargs) -> str:
         """Directly call Gemini API for each prompt, returning a string."""
         try:
-            response = client.generate_content(
+            response = client.models.generate_content(
                 model=model_id,
                 contents=[{"role": "user", "parts": [{"text": prompt}]}],
                 generation_config=generation_config