Buy a new phone number

curl --request POST \
  --url https://app.happyrobot.ai/api/v1/numbers \
  --header 'Content-Type: application/json' \
  --header 'authorization: <authorization>' \
  --data '{
  "area_code": "<string>"
}'

{
  "id": "<string>",
  "organization_id": "<string>",
  "number": "<string>",
  "sid": "<string>",
  "locality": "<string>",
  "routes": [
    {
      "probability": 123,
      "assistant_id": "<string>",
      "model_name": "<string>"
    }
  ]
}