def get_user_detail(self, req, account, user):
        """Returns the response body of a GET request for the specified user
        The body is in JSON format and contains all user information.

        :param req: The swob request
        :param account: the account the user is a member of
        :param user: the user

        :returns: A JSON response with the user detail information, None
                  if the user doesn't exist
        """
        path = quote('/v1/%s/%s/%s' % (self.auth_account, account, user))
        resp = self.make_pre_authed_request(
            req.environ, 'GET', path).get_response(self.app)
        if resp.status_int == 404:
            return None
        if resp.status_int // 100 != 2:
            raise Exception('Could not get user object: %s %s' %
                            (path, resp.status))
        return resp.body
Returns the response body of a GET request for the specified user
        The body is in JSON format and contains all user information.

        :param req: The swob request
        :param account: the account the user is a member of
        :param user: the user

        :returns: A JSON response with the user detail information, None
                  if the user doesn't exist