curl --request POST \
  --url https://public-api.etoro.com/api/v1/sub-accounts/me/accounts \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <x-api-key>' \
  --header 'x-request-id: <x-request-id>' \
  --header 'x-user-key: <x-user-key>' \
  --data '
{
  "providerName": "etoro-trading",
  "additionalParams": {
    "username": "my-trading-account"
  }
}
'

{
  "account": {
    "subAccountId": "ZXRvcm8tdHJhZGluZw",
    "providerName": "etoro-trading",
    "accountId": "123456789",
    "accountType": "Trading",
    "accountVisibility": "Visible",
    "accountCurrencies": [
      "USD"
    ],
    "status": "Approved",
    "additionalData": {
      "gcid": 123456789,
      "realCid": 654321,
      "demoCid": 111222,
      "username": "my-trading-account"
    }
  },
  "authorization": null
}