text: DROP TABLE IF EXISTS security.user_name;
  CREATE TABLE security.user_name (
    id            UUID DEFAULT RANDOM_UUID() NOT NULL,
    user_name     VARCHAR(64)        NOT NULL
                  CONSTRAINT UC_3109_security_user_name_must_be_unique
                  UNIQUE,
    password      VARCHAR(1024)      NOT NULL,
    create_time   TIMESTAMP WITHOUT TIME ZONE  NOT NULL   DEFAULT now(),
    update_time   TIMESTAMP WITHOUT TIME ZONE  NOT NULL   DEFAULT now(),
    enabled       BOOLEAN                                 DEFAULT true,
    visible       BOOLEAN                                 DEFAULT true,
    flags         INT
  );
  