adding api key as a secret

app.py

@@ -1,12 +1,12 @@
 import pandas as pd
 import os
-from dotenv import load_dotenv
 from langchain.chat_models import init_chat_model
 from langchain_community.agent_toolkits import create_sql_agent
 from langchain_community.utilities import SQLDatabase
 from sqlalchemy import create_engine
 import gradio as gr
-load_dotenv()
+
+os.environ["GOOGLE_API_KEY"]=os.getenv("GOOGLE_API_KEY")
 
 llm = init_chat_model("gemini-2.5-flash", model_provider="google_genai")
 # --- Config ---