title: Endpoint requests returns 404 not found for uber-api sandbox environment
body: <p>Uber apis <code>requests</code> endpoint in sandbox gives response as: </p>
  
  <p><code>u'&lt;html&gt;&lt;title&gt;404: Not Found&lt;/title&gt;&lt;body&gt;404: Not Found&lt;/body&gt;&lt;/html&gt;'</code> . </p>
  
  <p>For sandbox I am using endpoint: </p>
  
  <pre><code>https://sandbox-api.uber.com/v1/sandbox/requests
  </code></pre>
  
  <p>Same request works fine if  I use uber prod endpoint </p>
  
  <p><code>https://api.uber.com/v1/requests</code></p>
  
  <p>I used python requests lib for api:</p>
  
  <pre><code>import request
  
  params = {'start_longitude': 'xx.xxxxxx', 'end_longitude': 'xx.xxxxxx', 
            'start_latitude': 'xx.xxxxxx', 'end_latitude': 'xx.xxxxxx', 
            'product_id': '0dfc35e0-b4be-49a1-b1bf-0bc7217e4b58'}
  header = {'Content-Type': 'application/json', 
            'Authorization': 'Bearer xxx-acces-token-xxx'`}
  
  res = requests.post('https://sandbox-api.uber.com/v1/sandbox/requests',
                       data=json.dumps(params), headers=headers)
  </code></pre>
  
  <p>And like I said this work if I change url to uber prod environment:</p>
  
  <pre><code> res = requests.post('https://api.uber.com/v1/requests',
                        data=json.dumps(params), headers=headers)
  </code></pre>