Push je data naar Cashplannr.

# 1. Get OAuth2 token
curl -X POST https://app.cashplannr.com/oauth/token \
  -d "grant_type=client_credentials" \
  -d "client_id=$CLIENT_ID" \
  -d "client_secret=$CLIENT_SECRET"

# 2. Push a transaction
curl -X POST https://app.cashplannr.com/ingest/v1/transactions \
  -H "Authorization: Bearer $TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "tenant_id": "tnt_8842",
    "source": "my-erp-prod",
    "external_id": "INV-2026-001",
    "type": "actual",
    "amount": -18400,
    "currency": "EUR",
    "due_date": "2026-06-02"
  }'