AngularFire2 - Setting custom key when pushing : <p>I am learning angularfire2 in Ionic2</p>

<pre><code> const newUser = this._db.list('/users');
  setTimeout(() =&gt; {
    newUser.push(this.userInfo)
      .then((data) =&gt; console.log(data))
  },3000)
</code></pre>

<p>I want to know if there is any way I can set my custom key when pushing new data. I tried various suggestion given on internet to update the key after insert, but no success.</p>
