Update app.py

app.py

@@ -26,6 +26,12 @@ from langgraph.graph import START, END, StateGraph
 from functions import *
 
 
+lang_api_key = os.getenv("lang_api_key")
+SERPER_API_KEY = os.getenv("SERPER_API_KEY")
+groq_api_key = os.getenv("groq_api_key")
+
+
+
 
 os.environ["LANGCHAIN_TRACING_V2"] = "true"
 os.environ["LANGCHAIN_ENDPOINT"] = "https://api.langchain.plus"