title: Intel XDK web services: foursquare OAuth2
body: <p>I am trying to add a foursquare web service to my app. I have done the OAuth2 authentication, and I got the access token. However, when I try to make a call for a web service like venue search, I keep getting the 401 Unauthorized error (error type: invalid authorization) as shown in the image. </p>
  
  <p>I would very much appreciate it if someone helps me out.</p>
  
  <p><a href="https://i.stack.imgur.com/dtDQd.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/dtDQd.png" alt="enter image description here"></a></p>
  
  <p>Thank you</p>