curl --request GET \
  --url https://api.ledger.so/v1/users/{userId}/cards \
  --header 'Api-Key: <api-key>'

{
  "data": [
    {
      "id": "<string>",
      "agentId": "<string>",
      "userId": "<string>",
      "type": "single",
      "purpose": "<string>",
      "status": "active",
      "last4": "<string>",
      "createdAt": 123,
      "credentialExposure": "never",
      "expirationMonth": "<string>",
      "expirationYear": "<string>",
      "limits": {
        "perAuth": 123,
        "perDay": 123,
        "perMonth": 123
      },
      "merchantHint": "<string>",
      "ttlDays": 123
    }
  ],
  "hasMore": true,
  "cursor": "<string>"
}