curl --request GET \
  --url https://api.mottostreaming.com/monetization/payment_methods/v1/batch \
  --header 'Authorization: Bearer <token>'

{
  "payment_methods": [
    {
      "id": "<string>",
      "project_id": "<string>",
      "user_id": "<string>",
      "provider": "PROVIDER_UNSPECIFIED",
      "sub_provider": "<string>",
      "type": "<string>",
      "last_four": "<string>",
      "expiration_month": 123,
      "expiration_year": 123,
      "card_brand": "<string>"
    }
  ]
}