ccurl --location 'https://api.sandbox.neofin.services/billing/122087378560242' \
  --header 'api-key: key' \
  --header 'secret-key: secret'

{
   "customer_mail":"teste@neofin.com.br",
   "fine":"",
   "status":"pending",
   "installments":1.0,
   "nfe_number":"000000021",
   "customer_phone":"+5533999751491",
   "fees":"",
   "by_mail":true,
   "installment_type":"custom",
   "billing_number":"122087378560242",
   "created_by_name":"Integração API",
   "customer_document":"24540707078",
   "discount_before_payment":"0",
   "integration_identifier":"Neofin-00000002241",
   "due_date":1703114722.0,
   "updated_at":1703084752.0,
   "by_whatsapp":false,
   "issued_at":1703084752.0,
   "amount":20000.0,
   "description":"Cobrança 000000021 Parcela 1 TESTE",
   "billing_url":"https://sandbox.neofin.com.br/pay?billing=122087378560242",
   "discount_before_payment_due_date":0.0,
   "customer_name":"Empresa teste LTDA",
   "type":"generic"
}

ccurl --location 'https://api.sandbox.neofin.services/billing/integration/your-integration-identifier-123' \
  --header 'api-key: key' \
  --header 'secret-key: secret'

{
   "customer_mail":"teste@neofin.com.br",
   "fine":"",
   "status":"pending",
   "installments":1.0,
   "nfe_number":"000000021",
   "customer_phone":"+5533999751491",
   "fees":"",
   "by_mail":true,
   "installment_type":"custom",
   "billing_number":"122087378560242",
   "created_by_name":"Integração API",
   "customer_document":"24540707078",
   "discount_before_payment":"0",
   "integration_identifier":"Neofin-00000002241",
   "due_date":1703114722.0,
   "updated_at":1703084752.0,
   "by_whatsapp":false,
   "issued_at":1703084752.0,
   "amount":20000.0,
   "description":"Cobrança 000000021 Parcela 1 TESTE",
   "billing_url":"https://sandbox.neofin.com.br/pay?billing=122087378560242",
   "discount_before_payment_due_date":0.0,
   "customer_name":"Empresa teste LTDA",
   "type":"generic"
}