Create a record.
Click on the Profile icon and select Payment options.
A pop-up window will open.

- Select "Stripe" from the list. (1)
- Click on the "Add" button. (2)

- Insert a title; the title will be displayed as the title of the Payment option in the order page. (1)
- Insert the "Secret Key"
- Insert the and "Publishable Key"
- Save the record.

Stripe has offers two pairs of keys. One pair is for making test payments, the other is for the live payments. Make sure to use the pair of keys for the live payments. As you can notice in the image, those keys include the word live, ie. sk_live for the Secret Key, pk_live for the "Publishable Key".
The record has been created. 👌
You can now close the pop-up window.
You can repeat the process to add a new record and use the keys of another Stripe account of yours.