title: Git Hub Api. check logged in user
body: <p>I am working on github api--gem  with Rails Framework. for Authentication i am using outh(client_id).
  For some reason ,i am not getting who is the logged in github user.
  I tried this. <a href="http://developer.github.com/v3/users/#get-the-authenticated-user" rel="nofollow">http://developer.github.com/v3/users/#get-the-authenticated-user</a>, but this gives me nil..</p>