def getpwuid(self, uid):
        for entry in self._users:
            if entry.pw_uid == uid:
                return entry
        raise KeyError()
Test that the None value is stripped when of the submissions
dataset/ETHPy150Open kuri65536/python-for-android/python-modules/twisted/twisted/python/fakepwd.py/UserDatabase.getpwuid--crossover with--dataset/ETHPy150Open kobotoolbox/kobocat/onadata/libs/data/tests/test_tools.py/TestTools.test_get_form_submissions_when_response_not_provided