Update app.py

app.py

@@ -454,7 +454,7 @@ def carbon_space(question):
                 db = mysql.connector.connect(
                         host="3.130.217.226",
                         user="csp_db_ext",
-                        password= DB_password,
+                        password= os.getenv('DB'),
                         database="scrapped_csp_db"
                     )
                 db_cursor = db.cursor()