import type { Kysely } from 'kysely';
/**
 * A dedicated table rather than a column on `account`: further authentication
 * factors can then be added without altering `account` again, which sqlite
 * makes tedious. A row exists only while the factor is enabled.
 */
export declare function up(db: Kysely<unknown>): Promise<void>;
export declare function down(db: Kysely<unknown>): Promise<void>;
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