title: Box API Refresh Token Expiring after 1 hour(BOX)
body: <p>I am using box API.<br>
  through Authentication i got <strong>Access Token(AT)</strong> and <strong>Refresh Token(RT)</strong>.<br>
  After 1 hour <strong>AT</strong> is expired. Now i am requesting to server with current  <strong>RT</strong> </p>
  
  <p><strong>Request:-</strong> <br>
  Post <br>
  <a href="https://api.box.com/oauth2/token" rel="nofollow noreferrer">https://api.box.com/oauth2/token</a> <br>
  Params :-  <br>
  1) grant_type <br>
  2) client_id <br>
  3) client_secret <br>
  4) refersh_token <br></p>
  
  <p>Actual result is like this <br>
  {<br>
  access_token:<strong>new AT</strong><br>
  refersh_token:<strong>new RT</strong><br>
  .....<br>
  .....<br>
  }</p>
  
  <p>but my result is <br>
  {<br>
  "error": "invalid_grant",<br>
  "error_description": "Refresh token has expired"<br>
  }<br></p>
  
  <p>Please help me.<br></p>
  
  <p>Thanks in Advance</p>