This route activates a non-activated user. You can use it to create your own activation flow. Send the frontegg-vendor-host as a header to declare which vendor. This is your domain name in the Frontegg Portal ➜ Workspace Settings ➜ Domains ➜ Domain Name. Send the required userId and activation token in the POST body. For generating an activation token, see the route under users for generating an activation token. If the vendor's sign in flow requires a password or recaptcha, send those values in the POST body. Instead of this route, consider using our email template for user activation.
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