-- migrate:up
CREATE TABLE  users (
    id SERIAL PRIMARY KEY,
    username TEXT UNIQUE NOT NULL,
    password_hash TEXT NOT NULL,
    created_at TIMESTAMPTZ DEFAULT CURRENT_TIMESTAMP NOT NULL
);

CREATE TABLE sessions (
    id VARCHAR(64) PRIMARY KEY,
    user_id INT REFERENCES users(id) ON DELETE CASCADE NOT NULL,
    expires_at TIMESTAMPTZ NOT NULL,
    created_at TIMESTAMPTZ DEFAULT CURRENT_TIMESTAMP NOT NULL
);

CREATE INDEX idx_sessions_expires_at ON sessions(expires_at);

-- migrate:down
DROP TABLE sessions;
DROP TABLE users;