Update agent.py

agent.py

@@ -18,7 +18,7 @@ from prompt import system_prompt
 
 llm = ChatOpenAI(
     model="gpt-4.1-nano",
-    api_key=os.getenv["OPENAI_API_KEY"],
+    api_key=os.getenv("OPENAI_API_KEY"),
     temperature=0
 )