title: Error while using context in Mongo-Atlas Stitch
body: <p>I'm trying to create a stitch for a Mongo-Atlas cluster.</p>
  
  <p>Here is the simple webhook function </p>
  
  <pre><code>exports = function(payload) {
     const mongodb = context.services.get("mongodb-atlas");
     const cyber = mongodb.db("cyber"); 
  
  };
  </code></pre>
  
  <p>unfortunately running this gives me the error</p>
  
  <blockquote>
    <p>TypeError: Cannot access member 'db' of undefined</p>
    
    <blockquote>
      <p>trace:  TypeError: Cannot access member 'db' of undefined
          at exports (function.js:4:18)
          at apply ()
          at function_wrapper.js:3:10
          at :12:1</p>
    </blockquote>
  </blockquote>
  
  <p>Basically the first get call returns <code>mongodb</code> as <code>undefined</code>. </p>
  
  <p>Anybody has run into this issue?</p>