text: DROP TABLE IF EXISTS user;
  DROP TABLE IF EXISTS request;
  
  CREATE TABLE user (
    user_id INTEGER PRIMARY KEY AUTOINCREMENT,
    username TEXT UNIQUE NOT NULL,
    password TEXT NOT NULL
  );
  
  CREATE TABLE request (
    request_id INTEGER PRIMARY KEY AUTOINCREMENT,
    author_id INTEGER NOT NULL,
    created TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
    body TEXT NOT NULL,
    FOREIGN KEY (author_id) REFERENCES user (user_id)
  );