@class NSString; @protocol NSURLAuthenticationChallengeSender; @interface ISStoreAuthenticationChallenge : ISAuthenticationChallenge @property long long failureCount; @property BOOL hasPassword; @property (retain) NSString *password; @property id<NSURLAuthenticationChallengeSender> sender; @property (retain) NSString *user; @property BOOL userNameIsEditable; - (id)init; - (void)dealloc; - (BOOL)userNameIsEmail; @end