s="token class-name">Controller</span> <span class="token punctuation">{</span>
  @action
  <span class="token function">login</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    <span class="token comment">// Log the user in, then reattempt previous transition if it exists.</span>
    <span class="token keyword">let</span> previousTransition <span class="token operator">=</span> <span class="token keyword">this</span><span clas