> Portal Navigation: > > - Append `.md` to any URL under `https://dev.wix.com/docs/` to get its markdown version. > - Pages are either content pages (article or reference text) or menu pages (a list of links to child pages). > - To get a menu page, truncate any URL to a parent path and append `.md` (e.g. `https://dev.wix.com/docs/sdk.md`, `https://dev.wix.com/docs/sdk/core-modules.md`). > - Top-level index of all portals: https://dev.wix.com/docs/llms.txt > - Full concatenated docs: https://dev.wix.com/docs/llms-full.txt ## Resource: Introduction ## Article: Introduction ## Article Link: https://dev.wix.com/docs/api-reference/crm/members-contacts/members/member-management/user-member/introduction.md ## Article Content: # About the User Member API With the User Member API you can retrieve information about members that are also Wix users. You can retrieve all members associated with a user identity across multiple sites. ## Before you begin It’s important to note the following before starting to code: - A site must have the [Wix Members Area](https://www.wix.com/app-market/web-solution/members-area) installed from the App Market. ## Terminology - **Wix user:** Users include site owners, who create a site, and site collaborators, who are invited by site owners to help manage the site and business. - **Identity:** Unique identifiers Wix uses to identify actors. Each identity has their own ID and access type. See [About Identities](https://dev.wix.com/docs/rest/articles/get-started/about-identities.md) for more information. @sdk_package_setup