/**
 * 保存 authorization 到缓存
 */
export declare function saveAuthorization(authorization: string): Promise<void>;
/**
 * 从缓存中读取 authorization
 */
export declare function getAuthorization(): Promise<string | null>;
/**
 * 清除 authorization 缓存
 */
export declare function clearAuthorizationCache(): Promise<void>;
export declare function isAuthorizationInvalidError(error: any): boolean;
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