add login

app.py

@@ -6,6 +6,8 @@ from langchain_core.prompts import PromptTemplate
 from langchain_core.output_parsers import StrOutputParser
 from knowledge_base import load_knowledge_base, format_knowledge_base
 
+login(token=os.getenv("HF_TOKEN"))
+
 # Load database
 knowledge = load_knowledge_base("database.txt")
 knowledge_context = format_knowledge_base(knowledge)