curl --request GET \
  --url https://api.zavu.dev/v1/phone-numbers/requirements \
  --header 'Authorization: Bearer <token>'

{
  "items": [
    {
      "id": "req_123",
      "countryCode": "DE",
      "phoneNumberType": "local",
      "action": "ordering",
      "requirementTypes": [
        {
          "id": "address_proof",
          "name": "Proof of Address",
          "description": "A document proving your address in Germany",
          "type": "document"
        }
      ]
    }
  ]
}