Update app.py

app.py

@@ -21,9 +21,9 @@ try:
     from langsmith import traceable
     LANGCHAIN_AVAILABLE = True
     os.environ["LANGSMITH_TRACING"] = "true"
-    os.environ["LANGSMITH_ENDPOINT"] = os.getenv('Langsmith_endpoint')
-    os.environ["LANGSMITH_API_KEY"] = os.getenv("Langsmith_api")
-    os.environ["LANGSMITH_PROJECT"] = os.getenv("Langsmith_project")
+    os.environ["LANGSMITH_ENDPOINT"] = os.getenv('LANGSMITH_ENDPOINT')
+    os.environ["LANGSMITH_API_KEY"] = os.getenv("LANGSMITH_API")
+    os.environ["LANGSMITH_PROJECT"] = os.getenv("LANGSMITH_PROJECT")
 except ImportError as e:
     logging.error(f"LangChain import error: {e}")
     LANGCHAIN_AVAILABLE = False