update the description text of the examples

examples/yggdrasil/launcher.go

@@ -0,0 +1,33 @@
+// This example used to act as a launcher, log in and obtain the access token.
+// The Yggdrasil Authentication is no longer available. This example doesn't work now.
+//
+// For now, you should use Microsoft Authentication. The description and example code can be found here:
+// https://wiki.vg/Microsoft_Authentication_Scheme
+package main
+
+import (
+	"flag"
+	"fmt"
+	"os"
+
+	"github.com/Tnze/go-mc/yggdrasil"
+)
+
+var (
+	user = flag.String("user", "", "Can be an email address or player name for unmigrated accounts")
+	pswd = flag.String("password", "", "Your password")
+)
+
+func main() {
+	flag.Parse()
+
+	resp, err := yggdrasil.Authenticate(*user, *pswd)
+	if err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+	id, name := resp.SelectedProfile()
+	fmt.Println("user:", name)
+	fmt.Println("uuid:", id)
+	fmt.Println("astk:", resp.AccessToken())
+}