Update src/chat_langraph.py

src/chat_langraph.py

@@ -19,8 +19,8 @@ class chatstate(TypedDict):
     messages: Annotated[List[BaseMessage], add_messages]
 
 # API keys (replace with your real keys or environment variables)
-
-
+api = os.environ.get("api")
+LANGSEARCH_API_KEY = os.environ.get("LANGSEARCH_API_KEY")
 # LLM
 llm = ChatGoogleGenerativeAI(model="gemini-2.5-flash", temperature=0.2, api_key=api)