curl --request GET \
  --url https://api.mnemom.ai/v1/billing/invoices \
  --header 'Authorization: Bearer <token>'

{
  "invoices": [
    {
      "id": "<string>",
      "amount_due": 123,
      "amount_paid": 123,
      "currency": "<string>",
      "status": "<string>",
      "created": 123,
      "hosted_invoice_url": "<string>",
      "invoice_pdf": "<string>"
    }
  ]
}