Update app.py

app.py

@@ -2,16 +2,16 @@ import os
 from dotenv import load_dotenv
 from langchain_community.utilities import SQLDatabase
 load_dotenv()
-db_uri = os.getenv("DB_CONNECTION_STRING", "")
+db_uri = os.getenv("DB_CONNECTION_STRING")
 db_final = SQLDatabase.from_uri(db_uri)
 import gradio as gr
 from file_upload import FileHandler
 from chat import ChatHandler
 
 # Initialize the FileHandler inline
-VECTOR_DB_PATH = os.getenv("VECTOR_DB_PATH_DB", "")
-OPENAI_API_KEY = os.getenv("OPENAI_API_KEY", "")
-GROK_API_KEY = os.getenv("GROK_API_KEY", "")
+VECTOR_DB_PATH = os.getenv("VECTOR_DB_PATH_DB")
+OPENAI_API_KEY = os.getenv("OPENAI_API_KEY")
+GROK_API_KEY = os.getenv("GROK_API_KEY")
 
 # Initialize FileHandler and ChatHandler
 file_handler = FileHandler(VECTOR_DB_PATH, OPENAI_API_KEY, GROK_API_KEY)