curl --request GET \
  --url https://api.prelude.dev/v2/verification/management/phone-numbers/sandbox \
  --header 'Authorization: Bearer <token>'

{
  "phone_numbers": [
    {
      "phone_number": "<string>",
      "attempt_code": "<string>",
      "created_at": "2023-11-07T05:31:56Z"
    }
  ]
}