export declare function login({ loginUrl, env, testPassportUrl, prodPassportUrl, }: {
    loginUrl?: string;
    env?: 'test' | 'prod';
    prodPassportUrl?: string;
    testPassportUrl?: string;
}): void;
export declare function userAvatar(uid: string, size?: 'small' | 'big'): string;
export declare function isMobile(): boolean;
export declare const generateRandomStr: () => string;