(node:64907) UnhandledPromiseRejectionWarning: ReferenceError: command is not defined
    at Client.<anonymous> (/Users/alex/Desktop/Development/GasperiSpam/index.js:30:2)
    at Client.emit (events.js:210:5)
    at MessageCreateHandler.handle (/Users/alex/Desktop/Development/GasperiSpam/node_modules/discord.js/src/client/websocket/packets/handlers/MessageCreate.js:9:34)
    at WebSocketPacketManager.handle (/Users/alex/Desktop/Development/GasperiSpam/node_modules/discord.js/src/client/websocket/packets/WebSocketPacketManager.js:105:65)
    at WebSocketConnection.onPacket (/Users/alex/Desktop/Development/GasperiSpam/node_modules/discord.js/src/client/websocket/WebSocketConnection.js:333:35)
    at WebSocketConnection.onMessage (/Users/alex/Desktop/Development/GasperiSpam/node_modules/discord.js/src/client/websocket/WebSocketConnection.js:296:17)
    at WebSocket.onMessage (/Users/alex/Desktop/Development/GasperiSpam/node_modules/ws/lib/event-target.js:120:16)
    at WebSocket.emit (events.js:210:5)
    at Receiver.receiverOnMessage (/Users/alex/Desktop/Development/GasperiSpam/node_modules/ws/lib/websocket.js:789:20)
    at Receiver.emit (events.js:210:5)
(node:64907) 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:64907) [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.