> For the complete documentation index, see [llms.txt](https://docs.sentiance.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.sentiance.com/sdk/api-reference/ios/user-creation-and-linking/user-linking/sentuserlinkingerror.md).

# SENTUserLinkingError

```objectivec
@interface SENTUserLinkingError : NSObject

@property (nonatomic) SENTUserLinkingFailureReason failureReason;
@property (nonatomic, copy) NSString *details;

- (instancetype)init NS_UNAVAILABLE;
- (instancetype)initWithFailureReason:(SENTUserLinkingFailureReason)failureReason
                              details:(NSString *)details NS_DESIGNATED_INITIALIZER;

@end
```