Get referral leaderboard

{
  "error": "<string>",
  "pagination": {
    "limit": 123,
    "order": "<string>",
    "page": 123,
    "total": 123
  },
  "result": [
    {
      "change": 123,
      "current_rank": 123,
      "exchange_id": "<string>",
      "invited_counter": 123,
      "previous_rank": 123,
      "profile_id": 123,
      "volume": 123,
      "wallet": "<string>"
    }
  ],
  "success": true
}