code: function () {
      var url = 'https://api.dropboxapi.com/2/users/get_current_account';
  
      return this._request('POST', url, {}).then(function (response) {
        var info = response.responseText;
  
        try {
          info = JSON.parse(info);
        } catch (e) {
          return Promise.reject(new Error('Could not query current account info: Invalid API response: ' + info));
        }
  
        return Promise.resolve({
          email: info.email
        });
      });
    }
docs: Fetches the user's info from dropbox and returns a promise for it.
  
  @return {Promise} a promise for user info object (email - the user's email address)
  
  @protected