curl --request POST \
  --url https://api.staging.kathan.tech/phone-numbers \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'X-User-ID: <api-key>' \
  --data '
{
  "phone_number": "<string>",
  "provider": "twilio",
  "account_sid": "<string>",
  "auth_token": "<string>",
  "whatsapp_token": "<string>",
  "label": "<string>"
}
'

{
  "id": "<string>",
  "provider": "<string>",
  "phone_number": "<string>",
  "status": "<string>",
  "label": "<string>",
  "created_at": "<string>"
}