title: Is it possible to use variable with toastController in Ionic or Angular?
body: <p>I want to present a toast message to the user with his first name that I have in a variable. Is it possible? If so, how?</p>
  
  <p>I want to do something like that:</p>
  
  <pre><code>this.toastCtrl.create({
    message: "Welcome user.firstname" ,
    duration: 3000
  }).present();
  </code></pre>
  
  <p>where <code>user.firstname</code> contains my user's firstname.</p>
  
  <p>PS: The code above is not working, it shows the message "Welcome user.firstname"</p>