text: CREATE TABLE IF NOT EXISTS tasks
  (
      guid text NOT NULL,
      user_id uuid NOT NULL,
      name text NOT NULL,
      urn text NOT NULL,
      schedule text NOT NULL,
      payload jsonb,
      created_at timestamp without time zone NOT NULL,
      id text NOT NULL,
      CONSTRAINT tasks_pkey PRIMARY KEY (guid),
      CONSTRAINT user_id_fk FOREIGN KEY (user_id)
          REFERENCES users (user_id) MATCH SIMPLE
          ON UPDATE NO ACTION
          ON DELETE NO ACTION
  )
  