curl --request GET \
  --url https://rest.staging.nickel.com/billPaymentMethods \
  --header 'Authorization: Bearer <token>'

{
  "billPaymentMethods": [
    {
      "id": "<string>",
      "achDetails": {
        "bankName": "JP Morgan Chase",
        "routingNumber": "<string>",
        "accountNumberLastFour": "<string>"
      },
      "cardDetails": {
        "brand": "visa",
        "last4": "<string>",
        "holderName": "<string>",
        "expMonth": "2",
        "expYear": "2030"
      },
      "billingDetails": {
        "name": "<string>",
        "companyName": "<string>",
        "street": "<string>",
        "city": "<string>",
        "state": "<string>",
        "zip": "<string>",
        "email": "<string>"
      }
    }
  ]
}