export declare type _cache = {
    setUsername: (username: string) => void;
    getUsername: () => string;
    _getKeyPrefix: () => string;
    _generateKey: (key?: string) => void;
    getItem: (key?: string) => string;
    setItem: (key: string, value: any) => void;
    removeItem: (key: string) => void;
    clear: () => void;
    keys: () => string[];
    addCookie: (name: string, value: any, path?: string, expiresHours?: number) => void;
    getCookie: (name: string) => string;
    deleteCookie: (name: string, path?: string) => void;
};