CREATE TABLE email_tokens (
    token_hash TEXT PRIMARY KEY,
    user_id    INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    address    TEXT NOT NULL,
    created_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ','now')),
    expires_at TEXT NOT NULL,
    used_at    TEXT
);

ALTER TABLE users ADD COLUMN pending INTEGER NOT NULL DEFAULT 0;