/**
 * Creates a navigation guard to redirect authenticated users away from auth pages
 *
 * @example
 * ```ts
 * import { createAuthGuard } from '@bagelink/auth'
 *
 * router.beforeEach(createAuthGuard({ redirectTo: '/dashboard' }))
 * ```
 */
export declare function createAuthGuard(config?: {
    redirectTo?: string;
}): (to: any, _: any) => Promise<string | true>;