$registerButton.click(function() {
  var email = $emailInput.val();
  var password = $passInput.val();
  ref.createUser({
    email: email,
    password: password
   },
   function(error, userData) {
       if (error) {
           switch (error.code) {
               case "EMAIL_TAKEN":
               console.log("The new user account cannot be created because the email is already in use.");
               break;
               case "INVALID_EMAIL":
               console.log("The specified email is not a valid email.");
               break;
               default:
               console.log("Error creating user:", error);
            }
      } else {
        // Email en password: worden meegegeven als objecten
        login({email:email,password: password});
        console.log("Successfully created user account with uid:", userData.uid);
      }

   });