export declare class IFlowAuthError extends Error {
    code: string;
    constructor(message: string, code: string);
}
export declare class IFlowTokenRefreshError extends IFlowAuthError {
    constructor(message: string);
}
export declare class IFlowApiKeyInvalidError extends IFlowAuthError {
    constructor(message: string);
}
export declare class IFlowRateLimitError extends IFlowAuthError {
    retryAfter: number;
    constructor(message: string, retryAfter: number);
}