title: discord.js-commando TypeError: this.fetchUser is not a function
body: <p>I recently coded a discord bot on my personal computer with nodejs and discord.js-commando it works just fine on windows, but I tried to put it on my raspberry pi 3b, I installed the lastest version of nodejs, I used scp to transfer the files tried to run the bot but it just gives me this error : </p>
  
  <pre><code>(node:2609) UnhandledPromiseRejectionWarning: TypeError: this.fetchUser is not a function
      at CommandoClient.&lt;anonymous&gt; (/home/pi/bot/node_modules/discord.js-commando/src/client.js:84:11)
      at Object.onceWrapper (events.js:417:28)
      at CommandoClient.emit (events.js:323:22)
      at WebSocketManager.triggerClientReady (/home/pi/bot/node_modules/discord.js/src/client/websocket/WebSocketManager.js:433:17)
      at WebSocketManager.checkShardsReady (/home/pi/bot/node_modules/discord.js/src/client/websocket/WebSocketManager.js:417:10)
      at WebSocketShard.&lt;anonymous&gt; (/home/pi/bot/node_modules/discord.js/src/client/websocket/WebSocketManager.js:199:14)
      at WebSocketShard.emit (events.js:311:20)
      at WebSocketShard.checkReady (/home/pi/bot/node_modules/discord.js/src/client/websocket/WebSocketShard.js:466:12)
      at WebSocketShard.onPacket (/home/pi/bot/node_modules/discord.js/src/client/websocket/WebSocketShard.js:438:16)
      at WebSocketShard.onMessage (/home/pi/bot/node_modules/discord.js/src/client/websocket/WebSocketShard.js:293:10)
  (node:2609) 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(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
  (node:2609) [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></pre>
  
  <p>I really think this has to do with the discord.js-commando package but I don't really know for sure.</p>