You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: jwt_validate_issuer_example_test.go
    path of file: ./repos/jwx/examples
    
    the code of the file until where you have to start completion: package examples_test

import (
	"fmt"
	"time"

	"github.com/lestrrat-go/jwx/v2/jwt"
)

func ExampleJWT_ValidateIssuer() {
	tok, err := jwt.NewBuilder().
		Issuer(`github.com
    
func ExampleJWT_ValidateIssuer() {
	tok, err := jwt.NewBuilder().
		Issuer(`github.com/lestrrat-go/jwx`).
		Expiration(time.Now().Add(time.Hour)).
		Build()
	if err != nil {
		fmt.Printf("failed to build token: %s\n", err)
		return
	}

	err = jwt.Validate(tok, jwt.WithIssuer(`nobody`))
	if err == nil {
		fmt.Printf("token should fail validation\n")
		return
	}
	fmt.Printf("%s\n", err)
	// OUTPUT:
	// "iss" not satisfied: values do not match
}