<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
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<USER_TASK:>
Description:
 def check_for_lounge_upgrade(self, email, password):
 """Check the CDRouter Support Lounge for eligible upgrades using your Support Lounge email & password. :param email: CDRouter Support Lounge email as a string. :param password: CDRouter Support Lounge password as a string. :return: :class:`system.Release <system.Release>` object :rtype: system.Release """

        schema = ReleaseSchema()
        resp = self.service.post(self.base+'lounge/check/',
                                 json={'email': email, 'password': password})
        return self.service.decode(schema, resp)