Update app.py

app.py

@@ -6,6 +6,16 @@ from langchain_core.prompts import ChatPromptTemplate
 from langchain_core.runnables import RunnablePassthrough
 from langchain_groq import ChatGroq
 from langchain_community.embeddings import OpenAIEmbeddings
+import logging
+from huggingface_hub import login
+
+hf_token = os.getenv("HF_TOKEN")
+if hf_token is None:
+    print("Please set your Hugging Face token in the environment variables.")
+else:
+    login(token=hf_token)
+
+logging.basicConfig(level=logging.DEBUG)