I'm creating a discord bot in NodeJS using discord.js module and I want to send a predefined message in the same channel where a user sends a particular text command.
eg.

```
const token = 'xyz';
const client = new Discord.Client();

client.on('message', (message) => {
    if (message.content === '!hi') {
        message.channel.send('Hello ${message.author}!');
    };
});

client.on('ready', () => {
    console.log('Bot is now connected');

    //  client.channels.find(x => x.name === 'test').send('Hello I\'m now connected.');
});

client.login(token);```

client.on('message', (message) => {
    if (message.content === '!hi') {
        message.channel.send('Hello ${message.author}!');    }});

```

I expect the output to be `Hello @discordusername!` but instead, I'm getting `Hello ${message.author}!`