Added authorization operations

Added authorization operations and ability to get connection by authorization token.
>My concern here is what happens if the token is given but it's outdated? I did not test it but I think that we run into an exception (404?). I'm not convinced, it could very much be that the initial connection would fail anyhow. Maybe it shows that we really should do an integration test covering this scenario. 


Ok I got it.. Sorry!! Your saying what if in the time between making the initial connection with the token and doing some other operation the token expires. 


I'll write a unit test for that.  And we probably need to unit test the "forbidden" stuff too when we add the list and get operations. :)