Update app.py

app.py

@@ -26,6 +26,7 @@ contacts_df = load_contacts()
 def get_sheet():
     scope = ["https://spreadsheets.google.com/feeds", "https://www.googleapis.com/auth/drive"]
     creds = ServiceAccountCredentials.from_json_keyfile_name(CREDS_FILE, scope)
+    st.write("🔐 Using service account:", creds.service_account_email)
     client = gspread.authorize(creds)
     sheet = client.open_by_url("https://docs.google.com/spreadsheets/d/1bYRrOokZ_D85fj_0bbByc6dfaxW50Hj2PqDRG_r25yU")
     return sheet.worksheet(SHEET_NAME)