Golang의 개인 키로 SSH를 사용하여 원격 서버에 연결하는 방법은 무엇입니까?

<code class="go">import (
    "log"
    "net"
    "os"

    "golang.org/x/crypto/ssh"
    "golang.org/x/crypto/ssh/agent"
)

func main() {
    // Establishes a connection to the SSH Agent
    sock, err := net.Dial("unix", os.Getenv("SSH_AUTH_SOCK"))
    if err != nil {
        log.Fatal(err)
    }
    agent := agent.NewClient(sock)

    // Acquires signers from the SSH Agent
    signers, err := agent.Signers()
    if err != nil {
        log.Fatal(err)
    }

    // Creates a list of authentication methods using the signers obtained
    auths := []ssh.AuthMethod{ssh.PublicKeys(signers...)}

    // Configures the client using the username and authentication details
    cfg := &ssh.ClientConfig{
        User: "username",
        Auth: auths,
    }
    cfg.SetDefaults()

    // Establishes a connection to the remote server
    client, err := ssh.Dial("tcp", "aws-hostname:22", cfg)
    if err != nil {
        log.Fatal(err)
    }

    // Creates a new session in the established connection
    session, err = client.NewSession()
    if err != nil {
        log.Fatal(err)
    }

    log.Println("Successfully established a session!")
}</code>