如何正确检查来自telnet服务器的消息？

I am trying to make a telnet client using the go-telnet library. I am able to connect to the server, but I was expecting to receive some data to login in with user and password.

But I don't get any message. What I could do until now is just send a message to the server and the server prints it.

If I connect using a regular telnet client first thing I have to do is to log in with user and password. I want to replicate this using my own client.

I don't see any examples on GitHub on how to send or receive messages so I am a little confused.

Here is my current code:

func main() {

    err = telnet.DialToAndCall("192.168.206.226:23", caller{})
    if err != nil {
        fmt.Println(err)
        os.Exit(1)
    }
}

type caller struct {}

func (c caller) CallTELNET(ctx telnet.Context, w telnet.Writer, r telnet.Reader) {
    scanner := bufio.NewScanner(os.Stdin)
    for scanner.Scan() {
        fmt.Println(scanner.Text())
    }
}

Are there any other steps I need to do when connecting? Or am I doing something wrong?

edit (reading part):

//var data []byte
for {
    //numBytes, err := conn.Read(data)
    reader := bufio.NewReader(os.Stdin)
    fmt.Println(reader.ReadString('
'))
}