Acceptance Testing in Ember Simple Auth

I am trying to write an assertion test that will test my login page on the app I am building. I am using both Ember Simple Auth and Ember Simple Auth Token. The test I am using to login looks like this:

test('Test login', function(assert) {
  let done = assert.async();
  visit('/sign-in');
  fillIn('.email-input', 'test@test.com');
  fillIn('.password-input', 'test1');
  click('.submit');
  andThen(function() {
    assert.equal(currentURL(), '/dashboard');
    done();
  });
});

This is one of the first test I have written, so I am not great at it yet. I assume I need to put something like authenticateSession() somewhere in there, but I am not sure where. Also, the code above is causing a network error.

Do you think me not having that method in there is causing that undefined? All apologies for rookie questions, but anything would help.

Thanks!