import type { AuthenticationToken } from '../models/AuthenticationToken.js';
import { BaseApiClient } from './BaseApiClient.js';
/**
 * Client for authentication token operations.
 */
export declare class AuthenticationApiClient extends BaseApiClient {
    /**
     * Generate an authentication JWT token for a merchant.
     * @param merchantId The Merchant Id (required)
     * @param requestId Optional X-Request-ID header value (may be null)
     * @returns AuthenticationToken
     */
    getAuthenticationTokens(merchantId: string, requestId?: string): Promise<AuthenticationToken>;
}