1let channelName = args.slice(0).join(' '); //Arguments to set the channel name
2message.guild.channels.create(channelName, {
3        type: "text", //This create a text channel, you can make a voice one too, by changing "text" to "voice"
4        permissionOverwrites: [
5           {
6             id: message.guild.roles.everyone, //To make it be seen by a certain role, user an ID instead
7             allow: ['VIEW_CHANNEL', 'SEND_MESSAGES', 'READ_MESSAGE_HISTORY'], //Allow permissions
8             deny: ['VIEW_CHANNEL', 'SEND_MESSAGES', 'READ_MESSAGE_HISTORY'] //Deny permissions
9		   }
10        ],
11      })
12
13//Note, you cant have, for example, VIEW_CHANNEL, in both allow and deny.

1// -- Create Channel/Room
2message.guild.channels.create('name', {
3	type: 'GUILD_TEXT',
4    permissionOverwrites: [{
5    	id: message.guild.id,
6        allow: ['VIEW_CHANNEL'],
7        deny: ['SEND_MESSAGES'],
8	}]
9});
10console.info(`name channel: name | type: text channel`)

1const user = <client>.users.cache.get('<id>');
2user.send('<content>');

1This is not possible in discord.js.