curl --request POST \
  --url https://v1.api.flux-os.com/currencies/convert \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --header 'x-user-id: <api-key>' \
  --data '
{
  "value": 123,
  "from_currency": "<string>",
  "to_currency": "<string>"
}
'

{
  "data": {
    "from": {
      "value": 123,
      "currency": {
        "name": "<string>",
        "symbol": "<string>",
        "id": "<string>"
      }
    },
    "to": {
      "value": 123,
      "currency": {
        "name": "<string>",
        "symbol": "<string>",
        "id": "<string>"
      }
    },
    "conversion": {
      "exchange_rate": 123,
      "id": "<string>",
      "from_currency": 123,
      "to_currency": 123,
      "updated_at": "2023-11-07T05:31:56Z"
    }
  }
}