What are the names of customers who use payment method "Cash"?
SELECT customer_name FROM customers WHERE payment_method  =  "Cash"
SELECT customer_name FROM customers WHERE payment_method  =  "Cash"
[{'customer_name': 'Dr. Julia Wuckert MD'}, {'customer_name': 'Maudie Kertzmann'}, {'customer_name': 'Kitty Padberg III'}, {'customer_name': 'Prof. Ibrahim Bashirian'}]