/**
 * Store token securely in OS keychain
 */
export declare function storeToken(token: string, scopes?: string): Promise<void>;
/**
 * Retrieve token from OS keychain
 */
export declare function retrieveToken(): Promise<string | null>;
/**
 * Retrieve stored scopes
 */
export declare function retrieveScopes(): Promise<string | null>;
/**
 * Delete token from OS keychain
 */
export declare function deleteToken(): Promise<boolean>;