> 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/important-topics/sdk/api-reference/ios/user-creation-and-linking/user-linking/sentnoopuserlinker.md). # SENTNoOpUserLinker Set this linker in the SENTUserCreationOptions supplied to `createUserWithOptions: completionHandler:` method to create an unlinked user.\\ If you wish to link this user at a later time, you can use either one of `linkUserWithLinker: completionHandler` or `linkUserWithAuthCode: completionHandler:` However, note that linking a user after its creation has certain limitations.\\ An unlinked Sentiance user cannot be linked to an app user that already exists on the Sentiance Platform (i.e. with an app user identifier that you already supplied to Sentiance during a past linking request). You can only link to an app user that is new to Sentiance. This is because an existing app user will already have a corresponding Sentiance user on the platform, and that Sentiance user cannot be restored here anymore. To restore that user, you must reset the SDK and recreate a linked Sentiance user instead. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://docs.sentiance.com/important-topics/sdk/api-reference/ios/user-creation-and-linking/user-linking/sentnoopuserlinker.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.