List Billing Accounts

curl --request GET \
  --url https://api.altostrat.io/workspaces/{workspace_id}/billing-accounts \
  --header 'Authorization: Bearer <token>'

{
  "data": [
    {
      "id": "<string>",
      "workspace_id": "<string>",
      "name": "<string>",
      "email": "jsmith@example.com",
      "phone": "<string>",
      "description": "<string>",
      "currency": "usd",
      "address": {
        "country": "<string>",
        "line1": "<string>",
        "line2": "<string>",
        "city": "<string>",
        "state": "<string>",
        "postal_code": "<string>"
      },
      "created_at": "2023-11-07T05:31:56Z",
      "updated_at": "2023-11-07T05:31:56Z"
    }
  ]
}