/**
 * Smart login — headed interactive authentication by default.
 *
 * Strategy:
 *   1. If FIDO2 is explicitly enabled and prerequisites exist → try auto-login
 *   2. If auto-login fails or prerequisites not met → interactive login
 *
 * Auto-login errors are caught and logged, then we immediately fall back
 * to interactive. Only if interactive also fails does the user see an error.
 */
import type { TeamsToken, SmartLoginOptions } from "./types.js";
export declare function acquireTokenViaSmartLogin(options?: SmartLoginOptions): Promise<TeamsToken>;
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