@class NSString; @interface OACredential : NSObject @property (copy, nonatomic) NSString *consumerKey; @property (copy, nonatomic) NSString *consumerSecret; @property (copy, nonatomic) NSString *oauthToken; @property (copy, nonatomic) NSString *oauthTokenSecret; - (id)signingKey; - (void)dealloc; @end