curl --request GET \
  --url https://api.leanrails.com/v1/balance \
  --header 'Authorization: Basic <encoded-value>'

{
  "object": "balance",
  "available": [
    {
      "amount": 123,
      "currency": "<string>"
    }
  ],
  "pending": [
    {
      "amount": 123,
      "currency": "<string>"
    }
  ],
  "livemode": true,
  "connect_reserved": [
    {
      "amount": 123,
      "currency": "<string>"
    }
  ]
}