text: CREATE TABLE users (id bigserial PRIMARY KEY,
                      email varchar(128) NOT NULL UNIQUE,
                      name varchar(128) NOT NULL,
                      password varchar(256) NOT NULL);
  
  CREATE TABLE item (id bigserial PRIMARY KEY,
                      description varchar(256) NOT NULL,
                      user_id bigint,
                      created bigint NOT NULL,
                      done boolean NOT NULL DEFAULT FALSE,
                      FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE SET NULL);