Golang SSH script for F5?

I am testing a small program written in go to SSH into an F5 do some work but still getting a failure to connect . Has anyone else ran into a similar issue? Code is below:

package main

import (

"bytes"

"fmt"

"golang.org/x/crypto/ssh"

"log"

)

func main() {

devices := make([]string, 0)

devices = append(devices,

"xxxxxx:22")

// An SSH client is represented with a ClientConn.

//

// To authenticate with the remote server you must pass at least one

// implementation of AuthMethod via the Auth field in ClientConfig.

config := &ssh.ClientConfig{

User: "xxxxxxx",

Auth: []ssh.AuthMethod{

ssh.Password("xxxxxxxx"),

},

HostKeyCallback: ssh.InsecureIgnoreHostKey(),

}

for _, d := range devices {

client, err := ssh.Dial("tcp", d, config)

if err != nil {

log.Fatal("Failed to dial: ", err)

}

// Each ClientConn can support multiple interactive sessions,

// represented by a Session.

session, err := client.NewSession()

if err != nil {

log.Fatal("Failed to create session: ", err)

}

// Once a Session is created, you can execute a single command on

// the remote side using the Run method.

var b bytes.Buffer

session.Stdout = &b

if err := session.Run("ls -l"); err != nil {

log.Fatal("Failed to run: " + err.Error())

}

fmt.Println(b.String())

err = session.Close()

if err != nil {

fmt.Printf("Failed to close session for %v\n", d)

}

}

}