CREATE TABLE users (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    displayname TEXT NOT NULL,
    username TEXT UNIQUE NOT NULL,
    password TEXT NOT NULL
);

CREATE TABLE posts (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    author_id INTEGER NOT NULL,
    created TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
    title TEXT NOT NULL,
    body TEXT NOT NULL,
    FOREIGN KEY (author_id) REFERENCES users (id)
);
