List Accounts

{
  "data": [
    {
      "accountId": "acc_12345",
      "name": "Primary Business Account",
      "description": "Main account for business operations",
      "purpose": "OPERATING",
      "classification": "PRIMARY",
      "status": "ACTIVE",
      "metadata": {
        "department": "finance",
        "costCenter": "HQ"
      },
      "updatedAt": "2025-04-29T13:29:15.064Z",
      "createdAt": "2025-04-29T13:29:15.064Z"
    }
  ],
  "next_cursor": "<string>",
  "page_size": 123
}