title: Why map transforms in object in MongoDB?
body: <p>I had a problem.</p>
  <p>When i create map in MongoDB
  Example Shop</p>
  <pre class="lang-js prettyprint-override"><code>        guildID: id,
          ownerID: owner_id,
          _premium: 0,
          Moderation:{
              auto:false,
              prefix:'k!',
              muterole:0,
              language: preferredLocale
          },
          Economy: {
              shop:new Map(),
              upXP:100,
              bonus:50,
              money:3,
              xp:5
          },
          options:{
              boxes:false
          }
  </code></pre>
  <p>Its create a object</p>
  <p><a href="https://i.stack.imgur.com/40Trm.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/40Trm.png" alt="enter image description here" /></a></p>
  <p>How to fix it?
  I use MongoDB(not mongoose)</p>