Error err :/

 guild.defaultChannel.send(`Goodbye to Bot ${member.user} :( `);
                            ^

TypeError: Cannot read property 'send' of undefined
    at Client.module.exports.member (D:\Power Bot\events\guildMemberRemove.js:4:29)
    at emitOne (events.js:115:13)
    at Client.emit (events.js:210:7)
    at GuildMemberRemoveAction.handle (D:\Power Bot\node_modules\discord.js\src\client\actions\GuildMemberRemove.js:20:62)
    at GuildMemberRemoveHandler.handle (D:\Power Bot\node_modules\discord.js\src\client\websocket\packets\handlers\GuildMemberRemove.js:9:38)
    at WebSocketPacketManager.handle (D:\Power Bot\node_modules\discord.js\src\client\websocket\packets\WebSocketPacketManager.js:102:65)
    at WebSocketConnection.onPacket (D:\Power Bot\node_modules\discord.js\src\client\websocket\WebSocketConnection.js:325:35)
    at WebSocketConnection.onMessage (D:\Power Bot\node_modules\discord.js\src\client\websocket\WebSocketConnection.js:288:17)
    at WebSocket.onMessage (D:\Power Bot\node_modules\ws\lib\EventTarget.js:103:16)
    at emitTwo (events.js:125:13)