CREATE TABLE IF NOT EXISTS sessions (
    token VARCHAR(64) PRIMARY KEY,
    account_id VARCHAR(64) NOT NULL UNIQUE,
    browser_id VARCHAR(64) NOT NULL,
    email VARCHAR(320) NOT NULL,
    password_ciphertext TEXT NOT NULL,
    user_hash VARCHAR(128) NOT NULL,
    imap_host VARCHAR(255) NOT NULL,
    imap_port BIGINT NOT NULL,
    imap_tls BIGINT NOT NULL,
    imap_tls_verify BIGINT NOT NULL,
    smtp_host VARCHAR(255) NOT NULL,
    smtp_port BIGINT NOT NULL,
    smtp_tls BIGINT NOT NULL,
    smtp_tls_verify BIGINT NOT NULL,
    timeout_secs BIGINT NOT NULL,
    created_at_unix BIGINT NOT NULL,
    last_accessed_unix BIGINT NOT NULL,
    user_agent VARCHAR(512) NOT NULL DEFAULT ''
);
CREATE INDEX IF NOT EXISTS idx_sessions_browser ON sessions(browser_id);
CREATE INDEX IF NOT EXISTS idx_sessions_user ON sessions(user_hash);
CREATE INDEX IF NOT EXISTS idx_sessions_expiry ON sessions(last_accessed_unix, timeout_secs);