def _set_password_hash(self, username, password_hash):
        raise NotImplementedError
ERROR: Try to remove follower from viewpoint without CONTRIBUTOR rights.
dataset/ETHPy150Open mathcamp/pypicloud/pypicloud/access/base.py/IMutableAccessBackend._set_password_hash--crossover with--dataset/ETHPy150Open viewfinderco/viewfinder/backend/www/test/remove_followers_test.py/RemoveFollowersTestCase.testNotContributor