Login
=====

Request
-------

:: 

    POST https://api.cloudplan.biz/api/user/login
    
    {
        "email":"...",
        "pw":"...",
        "session_duration": 3600       // (integer, optional) duration of the session in seconds
        "api_key": ""                  // (string, optional) used together with 'email' to obtain a session for that user
    }

Reply
-----

::

    {
        "result": true,
        "session_id": "...."    // the session id that will be used for any subsequent 
                                   api calls
    }



::

    bad_email
    user_not_found
    url_access_denied
    user_has_no_access