import { BaseModel } from '@ngcore/base';
/**
 * User - Nickname association.
 * Note that (unique) "nickname" acts as an id for local user accounts (possibly, across different users).
 * This table is stored only locally and is not synch'ed with cloud db. (More like a cookie.)
 *     Note: only the nicknames of authenticatable (associated with AuthIdentity) are stored.
 *     Local profile user nickname is stored in UserProfile.
 * The purpose of this model is to "bootstrap" login process.
 *     e.g., by finding a user account from a nickname.
 */
export declare class UserNickname extends BaseModel {
    private _uid;
    nickname: (string | null);
    accountId: (string | null);
    authId: (string | null);
    setNickname(_nickname: string): void;
    setAccountId(_accountId: string): void;
    setAuthId(_authId: string): void;
    constructor(_uid?: (string | null), nickname?: (string | null), accountId?: (string | null), authId?: (string | null));
    toString(): string;
    clone(): UserNickname;
    static clone(obj: any): UserNickname;
    copy(): UserNickname;
}