/**
 * Check if the current user is a superadmin
 *
 * Superadmin is determined by:
 * 1. SUPERADMIN_EMAIL environment variable (exact email match)
 * 2. User role (if role system is implemented)
 *
 * @returns {Promise<{ isSuperadmin: boolean; email: string | null }>}
 */
export declare function checkSuperadmin(): Promise<{
    isSuperadmin: boolean;
    email: string | null;
}>;
/**
 * Require superadmin access - throws error if not superadmin
 */
export declare function requireSuperadmin(): Promise<{
    email: string;
}>;
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