text: CREATE TABLE IF NOT EXISTS internal.ac_user_role (
    user_id             UUID           NOT NULL
      REFERENCES internal.ac_user (user_id),
    role_id             UUID           NOT NULL
      REFERENCES internal.ac_role (role_id),
  
    PRIMARY KEY (user_id, role_id)
  );
  
  COMMENT ON TABLE internal.ac_user_role IS 'Mapping of user to role';
  