implement authentication

[dhoss]

• [ ] authenticate
  • [ ] POST consumer key and redirect URI to https://getpocket.com/v3/oauth/request
  • [ ] get back request token
  • [ ] redirect user to pocket
  • [ ] pocket handles redirect back to app
  • [ ] POST consumer key and request token to https://getpocket.com/v3/oauth/authorize
  • [ ] get back authentication token
• [ ] make retrieval calls using authentication token and consumer key
  • [ ] handle errors
  • [ ] respect rate limits

[dhoss]

https://getpocket.com/developer/docs/authentication