Adding the displayName whilst using createUserWithEmailAndPassword
<p>I want to add the display name to the user that was just created. But when I createUserWithEmailAndPassword it sais my currentUser is null. Anything wrong?</p>

<pre><code>var name = document.getElementById("name").value;
var username = document.getElementById("username").value;
var email = document.getElementById('email').value;
var password = document.getElementById('password').value;
  // Sign in with email and pass.
  // [START createwithemail]
  firebase.auth().createUserWithEmailAndPassword(email, password).catch(function(error) {
    // Handle Errors here.
    var errorCode = error.code;
    var errorMessage = error.message;
    // [START_EXCLUDE]
    if (errorCode == 'auth/weak-password') {
      alert('The password is too weak.');
    } else {
      console.error(error);
    }
    // [END_EXCLUDE]
  });
  // [END createwithemail]
  var user = firebase.auth().currentUser;
  user.updateProfile({
      displayName: username
    }).then(function() {
      // Update successful.
    }, function(error) {
      // An error happened.
  });
document.getElementById("submitButton").innerHTML = "Loading...";
$("#submitButton").css("background-color", "#efefef");
$("#submitButton").css("cursor", "init");
$("#submitButton").css("color", "#aaa");
registerUserToDB(username, name, email);
console.log("shouldhave worked");
</code></pre>