curl --request POST \
  --url http://localhost:3000/api/v1/providers/ \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "company": "<string>",
  "contactName": "<string>",
  "email": "jsmith@example.com",
  "phone": "<string>",
  "createdAt": null,
  "updatedAt": null
}
'

{
  "id": "prov_1",
  "company": "Proveedor SAC",
  "contactName": "Juan Pérez",
  "email": "contacto@proveedor.com"
}