curl -X GET \
 /customers/{customerId}/payment-methods \
 --header "Authorization: Bearer <token>"

{
  "data": [
    {
      "id": "<string>",
      "customer": "https://example.com/",
      "gatewayName": "wallet",
      "type": "sepa_debit",
      "referenceId": "<string>",
      "default": true,
      "status": "active",
      "source": "api",
      "enabled": true,
      "name": "<string>",
      "data": [
        "<string>"
      ],
      "creationDate": "2023-11-07T05:31:56Z",
      "expirationDate": "2023-11-07T05:31:56Z",
      "sepaMandate": {
        "id": "ad8f0b9c-0b1a-4e1a-8b0a-0b1a4e1a8b0a",
        "status": "active",
        "creditorIdentifier": "<string>",
        "mandateReference": "MNDT-2021-0001",
        "bankAccount": {
          "id": "ad8f0b9c-4b1e-4e0e-8b9c-4b1e4e0e8b9c",
          "iban": "DE12500105170648489890",
          "bic": "PBNKDEFFXXX",
          "accountHolder": "Max Mustermann",
          "bankName": "Commerzbank"
        },
        "sequenceType": "FRST",
        "sepaType": "core"
      },
      "card": {
        "brand": "Visa",
        "last4": "4242",
        "expMonth": 12,
        "expYear": 2022,
        "cardHolder": "Max Mustermann"
      },
      "sepaDebit": {
        "iban": "DE8937*********3232",
        "bic": "COBADEFFXXX",
        "mandateReference": "MNDT-2021-123456",
        "signingDate": "2021-01-01T00:00:00+00:00"
      },
      "paypal": {
        "email": "max@mustermann.de",
        "billingAgreementId": "I-1J5gqz2eZvKYlo2C2X2X2X2X"
      },
      "expirationInDays": 123
    }
  ],
  "meta": {
    "pagination": {
      "totalItems": 123,
      "itemsPerPage": 123,
      "currentPage": 123,
      "lastPage": 123,
      "pageTotalItems": 123
    }
  }
}