Task: Text to Code
Input (English): What are the ids and first names of customers who do not hold a credit card?
Output (English): SELECT customer_id ,  customer_first_name FROM Customers EXCEPT SELECT T1.customer_id ,  T2.customer_first_name FROM Customers_cards AS T1 JOIN Customers AS T2 ON T1.customer_id  =  T2.customer_id WHERE card_type_code  =  "Credit"