code: func (b *Bittrex) GetBalances() (balances []Balance, err error) {
  	r, err := b.client.do("GET", "account/getbalances", "", true)
  	if err != nil {
  		return
  	}
  	var response jsonResponse
  	if err = json.Unmarshal(r, &response); err != nil {
  		return
  	}
  	if err = handleErr(response); err != nil {
  		return
  	}
  	err = json.Unmarshal(response.Result, &balances)
  	return
  }
docs: // Account
  // GetBalances is used to retrieve all balances from your account