Fetch all Sub-accounts.

Example response

{
  "status": "success",
  "message": "Successful",
  "data": [
    {
      "id": "7y5pmgbo",
      "sn": "QDX7WO4TOTY",
      "email": "test@gmail.com",
      "first_name": "test",
      "last_name": "user",
      "created_at": "2021-04-09T10:06:42.000Z",
      "updated_at": "2021-10-21T12:12:00.000Z"
    }
  ]
}