I'm trying to make an announcement command but getting an error - bots

Question

So basically I'm trying to send an announcement to specific channel using message.mentions.channels
ex !announce #announcements Today is a great day!
Error:
(node:5516) UnhandledPromiseRejectionWarning: TypeError: Cannot read property 'channels' of undefined
at Object.module.exports.execute (C:\Users\Zarko\Desktop\Stackoverflow\commands\Answers\announce.js:3:36)
at Client.<anonymous> (C:\Users\Zarko\Desktop\Stackoverflow\events\message.js:20:30)
at Client.emit (events.js:223:5)
at MessageCreateAction.handle (C:\Users\Zarko\node_modules\discord.js\src\client\actions\MessageCreate.js:31:14)
at Object.module.exports [as MESSAGE_CREATE] (C:\Users\Zarko\node_modules\discord.js\src\client\websocket\handlers\MESSAGE_CREATE.js:4:32)
at WebSocketManager.handlePacket (C:\Users\Zarko\node_modules\discord.js\src\client\websocket\WebSocketManager.js:386:31)
at WebSocketShard.onPacket (C:\Users\Zarko\node_modules\discord.js\src\client\websocket\WebSocketShard.js:436:22)
at WebSocketShard.onMessage (C:\Users\Zarko\node_modules\discord.js\src\client\websocket\WebSocketShard.js:293:10)
at WebSocket.onMessage (C:\Users\Zarko\node_modules\discord.js\node_modules\ws\lib\event-target.js:125:16)
at WebSocket.emit (events.js:223:5)
(node:5516) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:5516) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
Code:
let channel = message.mentions.channels.first();
if (!channel) return
let announcement = args.slice(1).join(" ");
channel.send(announcement)

Answer 1

Error was how you passed in variables:
in one of your other command files you had:
execute(client, message, args) {
//this works
}
And in your announce command file you had:
execute(message, args){
console.log(message, args);
/* =>
Client {
...
}
Message {
...
}
*/
}
So in this instance, message is the actual client object, and args is the actual message object, so simply just fix your variable spots,
Your new execute function in announce.js
execute(client, message, args) {
//rest of code here
}