title: Slideshare api getting 'Failed API Validation' error response
body: <p>I have applied for slideshare API and i got the API and the secret. All i have did is a simple GET request to slideshare which gives me results with the help of a tag.</p>
  
  <p>This is my deluge script which i have tried to call the url using the API.
  As per the documentation, i have got the unix time stamp and SHA1 hash.</p>
  
  <pre><code>param = Map();
  param.put("api_key","XYZ");
  param.put("ts","1565085930");
  param.put("hash","xxxxxxxxxxxxxxxxxxxxxxxxx");
  param.put("tag","cricket");
  request = invokeurl
  [
      url :"https://www.slideshare.net/api/2/get_slideshows_by_tag"
      type : GET
      parameters: param
  ];
  info request;
  </code></pre>
  
  <p>This is the response error i get:</p>
  
  <pre class="lang-xml prettyprint-override"><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt; 
     &lt;SlideShareServiceError&gt; 
          &lt;Message ID="1"&gt;Failed API validation&lt;/Message&gt; 
     &lt;/SlideShareServiceError&gt; 
  </code></pre>
  
  <p>Thank you.</p>