entity_type VARCHAR(5) NOT NULL CHECK ( entity_type IN ('group', 'user') ),
entity VARCHAR(64) NOT NULL,
allow VARCHAR(5) NOT NULL CHECK ( allow IN ('grant', 'deny') ),
entity_type VARCHAR(5) NOT NULL CHECK ( entity_type IN ('group', 'user') ),
entity VARCHAR(64) NOT NULL,
allow VARCHAR(5) NOT NULL CHECK ( allow IN ('grant', 'deny') ),