Telegram Bot for user tags.js

const fs = require('fs');
const T = require('telegraf');
const bot = new T(process.env.TOKEN);

const def = (u) => {
  let data = {flair: ""}
  fs.writeFileSync(`${u}.json`, JSON.stringify(data));
  return data;
}

const readData = (u) => {
  try {
    return require(`./${u}.json`);
  } catch {
    return def(u);
  }
}

const setFlair = (u, f) => {
  let data = readData(u);
  data.flair = f;
  fs.writeFileSync(`${u}.json`, JSON.stringify(data));
  return data.flair;
}

bot.command(['flair','tag'], ctx => {
  ctx.reply(readData(ctx.from.id).flair);
});

bot.command(['setflair', 'settag'], ctx => {
  if (ctx.telegram.getChatMember(ctx.chat.id, ctx.from.id).status === 'administrator' || ctx.telegram.getChatMember(ctx.chat.id, ctx.from.id).status === 'creator') {
    ctx.reply('Set tag ' + setFlair(ctx.message.reply_to_message.from.id, ctx.message.text.split(' ').reduce((a,e) => {return a + ' ' + e}));
  } else {
    ctx.reply('You must be an admin.');            
  }
});