text: CREATE TABLE USER_SHARING
  (
      LABEL   varchar NOT NULL,
      ALLOW   boolean NOT NULL,
      USER_ID varchar NOT NULL,
      PRIMARY KEY (LABEL, ALLOW, USER_ID),
      FOREIGN KEY (USER_ID) REFERENCES USER (ID)
  );
  
  ALTER TABLE USER
      add column AGE_RESTRICTION integer NULL;
  ALTER TABLE USER
      add column AGE_RESTRICTION_ALLOW_ONLY boolean NULL;
  