### Sign-in end user (with automatic sign-up) by sending an enchanted link via email Initiate a process that implements both sign-in and sign-up using a single endpoint. If the email address is already registered (the end user has already registered) the user will be signed in. If the email address is not registered (the end user is not yet registered) the user will be signed up. Descope will generate and deliver 3 clickable links to the email address specified, each is numbered with random 2 digit number. When you initiate the enchanted link, the `linkId` will be returned. This `linkId` needs to be displayed to the user to indicate which link for the user to click once they receive the email. Only when the correct link is clicked will the user be successfully verified and logged in. Each clickable link is made up of two parts - the URI you provide in the `URI` field and the enchanted link token generated by Descope. For example, if `URI=https://app.mycompany.com/enchantedlink/verify`, the clickable enchanted link will be `https://app.mycompany.com/enchantedlink/verify?t=enchanted-link-token.` Enchanted links expire in the time frame configured in the [Descope console](https://app.descope.com/settings/authentication/enchantedlink), so sending multiple enchanted links (for example, when an end user tries to sign-up a second or third time) does not invalidate links that have already been sent. The return body will include `linkId` and `pendigRef`. The `linkId` (a 2 digit number) should be presented to the user, so they will know which link to click in the delivered email. The endpoint will return a failure code if the email address is already registered. Note that `URI` is an optional parameter. If omitted - the project setting will apply. If provided - it should to be part of the allowed `Approved Domains` configured in the project settings. ### Next Steps 1. Verify the enchanted link token using the [Verify Token](/api/enchanted-link/verify-token) endpoint. 2. Poll for the successful completion of the token verification using the [Poll Session](/api/enchanted-link/poll-session) endpoint, providing the `pendingRef` returned by the this endpoint. ### See Also - See [Enchanted link Authentication](/api/enchantedlink/) for details about implementing enchanted links. - See [The User Object](/api/overview#the-user-object) for further details on how to identify users and their contact information such as email addresses and phone number. - See [User Login Options](/api/overview#user-login-options) for further details on loginOptions. - Use the [Sign-Up](/api/enchanted-link/sign-up) endpoint to sign-up a new end user. - Use the [Sign-In with Auto Sign-up](/api/enchanted-link/sign-in-auto-sign-up) endpoint to create a single sign-up and sign-in flow, which will create a new end user if they are not already registered. ### Endpoint Authentication Use authorization bearer header with the following format: `Authorization: Bearer <Project ID>`