Add WalletBalance example

Author: XZB-1248

examples/main.go

@@ -4,5 +4,6 @@ func main() {
 	// Ticker()
 	// Ohlcv()
 	// SpotOrder()
-	FuturesOrder()
+	// FuturesOrder()
+	WalletBalance()
 }

examples/wallet.go

@@ -0,0 +1,30 @@
+package main
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/adshao/go-binance/v2"
+)
+
+func WalletBalance() {
+	apiKey := ""
+	secret := ""
+	client := binance.NewClient(apiKey, secret)
+
+	quoteAsset := "USDT"
+
+	res, err := client.NewWalletBalanceService().
+		QuoteAsset(quoteAsset).
+		Do(context.Background())
+
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+
+	for _, w := range res {
+		fmt.Printf("%s: %s\n", w.WalletName, w.Balance)
+	}
+
+}