We will create a new, or update an existing, Stripe Customer when the user places an order after entering their credit card details. To implement this, we will update the user controllers with a stripeCustomer method that will be called before the order is created when our server receives a request to the create order API (discussed in the Creating new order section).
In the stripeCustomer controller method, we will need to use the stripe npm module:
npm install stripe --save
After installing the stripe module, it needs to be imported into the user controller file and the stripe instance initialized with the application's Stripe secret key.
mern-marketplace/server/controllers/user.controller.js:
import stripe from ...
