Nodejs change the bot's nickname every time the variable change DISOCRD.JS

I'm doing a dominance ticker for bitcoin and I want to show the price in the nickname of the bot, the thing is that I don't know why but I can't change the nickname, it throws me an error.

const { Client } = require('discord.js');  const client = new Client();  const request = require("request");  var LastBitcoinDominance = 100;    client.on("ready", () => {      console.log(`Logged in as ${client.user.tag}!`);  })      myFunction()  function myFunction() {        const url = "API";        request(url, (err, res, body) => {          const data = JSON.parse(body);              var bitcoinDominance = data.bitcoin_dominance_percentage;            if (bitcoinDominance == LastBitcoinDominance){              console.log("Bitcoin dominance and LastBitcoinDominacne are the same")          }else {              client.user.setUsername(bitcoinDominance)              LastBitcoinDominance = bitcoinDominance;          }      });        setTimeout(myFunction, 10000);  }  client.token(TOKEN)  

https://stackoverflow.com/questions/65572695/nodejs-change-the-bots-nickname-every-time-the-variable-change-disocrd-js January 05, 2021 at 11:06AM