title: Access a hash with a dynamic variable - getting Parse error Expecting 'ID', got 'INVALID'
body: <p>I have a hash in my route defined as:</p>
  
  <pre><code>model: function() {
    return Ember.RSVP.hash({
      signedServices: {
        lyft: false,
        uber: false,
        postmates: false,
        doordash: false,
        caviar: false
      }
    });
  },
  </code></pre>
  
  <p>In my handlebar view, I'm iterating through all my services and outputting the value of the hash:</p>
  
  <pre><code>{{#each (signup-services-array model.signedServices) as |serviceName|}}
    {{model.signedServices[serviceName]}}
  {{/each}}
  </code></pre>
  
  <p>However, I keep running into the error:</p>
  
  <pre><code>Parse error on line 108:
  ...        {{log model.signedServices['lyft
  -----------------------^
  Expecting 'ID', got 'INVALID'
  </code></pre>
  
  <p><strong>What does this error mean and how do I resolve it?</strong></p>