Ability for a merchant to create a new account for use with wallet top ups.
successful operation
{- "checkoutId": "a21b4d66-7585-4979-80ec-60ea35b35821",
- "accountName": "string",
- "accountNumber": "stringst",
- "sortCode": "string"
}
{- "success": true,
- "message": "string",
- "data": { }
}