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 class="token punctuation">.</span>previousTransition<span class="token punctuation">;</span>
      <span class="token keyword">if</span> <span class="token punctuation">(</span>previousTransition<span class="token punctu