code: function() {
                  console.log('oauthInterface.authorization.signOut');
                  delete this.params.data;
                  return this.request({
                      url: this._buildUri(this.uri + '/signout'),
                      method: corbel.request.method.GET,
                      withCredentials: true
                  }).then(function(res) {
                      return corbel.Services.getLocationId(res);
                  });
              }
docs: Sign out from oauth server
  @method
  @memberOf corbel.Oauth.SignOutBuilder
  @return {Promise}     promise that resolves empty when the sign out process completes or rejects with a {@link CorbelError}