Update app.py

app.py

@@ -90,7 +90,7 @@ user_agent = os.getenv("USER_AGENT")
 dr_link_url1 = os.getenv("DR_LINK_1")
 dr_link_url2 = os.getenv("DR_LINK_2") 
 azure_endpt = os.getenv("AZURE_ENDPT") 
-
+huffingface_read_token = os.getenv("huffingface_read_token")
 
 list_llm = ["mistralai/Mistral-7B-Instruct-v0.2", "mistralai/Mixtral-8x7B-Instruct-v0.1", "mistralai/Mistral-7B-Instruct-v0.1", \
     "google/gemma-7b-it","google/gemma-2b-it", \
@@ -291,6 +291,7 @@ def build_qa_chain(collection_name, vector_db, file: str, llm_option, temperatur
     if llm_model == "mistralai/Mixtral-8x7B-Instruct-v0.1":
         llm = HuggingFaceEndpoint(
             repo_id=llm_model, 
+            huggingfacehub_api_token = huffingface_read_token,
             task=task,  # Explicitly specify task
             # model_kwargs={"temperature": temperature, "max_new_tokens": max_tokens, "top_k": top_k, "load_in_8bit": True}
             temperature = temperature,