/**
 * `supen login` — Authenticate with a Supen gateway.
 *
 * Prompts for gateway URL (if not provided), email, and password.
 * Stores the resulting auth token in ~/.supen/auth.json.
 */
import { Command } from 'commander';
export declare function registerLoginCommand(program: Command): void;
export declare function promptPassword(label: string): Promise<string>;
interface LoginResult {
    access_token: string;
    refresh_token: string;
    expires_in: number;
    user?: {
        email: string;
        id: string;
    };
}
export declare function loginToGateway(gatewayUrl: string, email: string, password: string): Promise<LoginResult>;
export {};