export declare class PopUser {
    user: string;
    pass: string;
    secret: string | null;
    udata: any;
    /**
     * Constructs a new PopUser.
     * @param user the user.
     * @param pass the password.
     * @param secret the secret.
     * @param udata the user data.
     */
    constructor(user: string, pass: string, secret?: string | null, udata?: any);
    /**
     * Gets the plain password.
     */
    get pass_plain(): string;
}