if (addExp[i].id == client.user.id){
                  ^

TypeError: Cannot read property 'id' of undefined
    at module.exports (C:\Users\Voltan\Desktop\Ayve\Ayve-master\events\message.js:13:19)
    at Client.emit (events.js:198:13)
    at MessageCreateHandler.handle (C:\Users\Voltan\Desktop\Ayve\Ayve-master\node_modules\discord.js\src\client\websocket\packets\handlers\MessageCreate.js:9:34)
    at WebSocketPacketManager.handle (C:\Users\Voltan\Desktop\Ayve\Ayve-master\node_modules\discord.js\src\client\websocket\packets\WebSocketPacketManager.js:105:65)
    at WebSocketConnection.onPacket (C:\Users\Voltan\Desktop\Ayve\Ayve-master\node_modules\discord.js\src\client\websocket\WebSocketConnection.js:333:35)
    at WebSocketConnection.onMessage (C:\Users\Voltan\Desktop\Ayve\Ayve-master\node_modules\discord.js\src\client\websocket\WebSocketConnection.js:296:17)
    at WebSocket.onMessage (C:\Users\Voltan\Desktop\Ayve\Ayve-master\node_modules\ws\lib\event-target.js:120:16)
    at WebSocket.emit (events.js:198:13)
    at Receiver.receiverOnMessage (C:\Users\Voltan\Desktop\Ayve\Ayve-master\node_modules\ws\lib\websocket.js:789:20)
    at Receiver.emit (events.js:198:13)