*MANDATORY STEPS FOR AUTHENTICATION*
1. Call "Get Request Token" API. It will return the Request Token as "code"

2. Build a URL in this format: https://getpocket.com/auth/authorize?request_token=YOUR_REQUEST_TOKEN&redirect_uri=YOUR_REDIRECT_URI

For eg: https://getpocket.com/auth/authorize?request_token=dcba4321-dcba-4321-dcba-4321dc&redirect_uri=http://www.google.com

3. Call "Get Access Token API". It will return the Pocket Access Token as "access_token" and Username as "username"

4. Use this access token to run the Retrieve, Add & Modify API calls