func (fill *FillModel) ParseCreatedAt() time.Time {
	return time.Unix(fill.CreatedAt/1000, 0)
}
ParseCreatedAt returns the creation time as time.Time
package kucoin
import (
	"net/http"
	"strconv"
	"time"
)
type FillModel struct {
	Symbol         string `json:"symbol"`
	TradeId        string `json:"tradeId"`
	OrderId        string `json:"orderId"`
	CounterOrderId string `json:"counterOrderId"`
	Side           string `json:"side"`
	Liquidity      string `json:"liquidity"`
	ForceTaker     bool   `json:"forceTaker"`
	Price          string `json:"price"`
	Size           string `json:"size"`
	Funds          string `json:"funds"`
	Fee            string `json:"fee"`
	FeeRate        string `json:"feeRate"`
	FeeCurrency    string `json:"feeCurrency"`
	Stop           string `json:"stop"`
	Type           string `json:"type"`
	CreatedAt      int64  `json:"createdAt"`
}
func (fill *FillModel) ParsePrice() float64 {
	out, err := strconv.ParseFloat(fill.Price, 64)
	if err == nil {
		return out
	}
	return 0
}
func (fill *FillModel) ParseSize() float64 {
	out, err := strconv.ParseFloat(fill.Size, 64)
	if err == nil {
		return out
	}
	return 0
}