register with idp intent

apps/login/src/app/(login)/idp/[provider]/success/page.tsx

@@ -24,6 +24,7 @@ import {
 } from "@zitadel/proto/zitadel/user/v2/user_service_pb";
 import { getLocale, getTranslations } from "next-intl/server";
 import { headers } from "next/headers";
+import { redirect } from "next/navigation";
 
 const ORG_SUFFIX_REGEX = /(?<=@)(.+)/;
 
@@ -205,6 +206,7 @@ export default async function Page(props: {
       }
     }
 
+    // if addHumanUser is provided in the intent, expect that it can be created otherwise show an error
     if (addHumanUser) {
       let addHumanUserWithOrganization: AddHumanUserRequest;
       if (orgToRegisterOn) {
@@ -241,6 +243,16 @@ export default async function Page(props: {
             : "Could not create user",
         );
       }
+    } else {
+      // if no user was found, we will create a new user manually / redirect to the registration page
+      if (options.isCreationAllowed) {
+        const registerParams = new URLSearchParams({
+          idpIntentId: id,
+          idpIntentToken: token,
+          organization: organization ?? "",
+        });
+        return redirect(`/register?${registerParams})}`);
+      }
     }
 
     if (newUser) {

apps/login/src/app/(login)/register/page.tsx

@@ -7,6 +7,7 @@ import {
   getLegalAndSupportSettings,
   getLoginSettings,
   getPasswordComplexitySettings,
+  retrieveIDPIntent,
 } from "@/lib/zitadel";
 import { Organization } from "@zitadel/proto/zitadel/org/v2/org_pb";
 import { getLocale, getTranslations } from "next-intl/server";
@@ -19,7 +20,15 @@ export default async function Page(props: {
   const locale = getLocale();
   const t = await getTranslations({ locale, namespace: "register" });
 
-  let { firstname, lastname, email, organization, requestId } = searchParams;
+  let {
+    firstname,
+    lastname,
+    email,
+    organization,
+    requestId,
+    idpIntentId,
+    idpIntentToken,
+  } = searchParams;
 
   const _headers = await headers();
   const { serviceUrl } = getServiceUrlFromHeaders(_headers);
@@ -33,6 +42,17 @@ export default async function Page(props: {
     }
   }
 
+  let idpIntent;
+  if (idpIntentId && idpIntentToken) {
+    idpIntent = await retrieveIDPIntent({
+      serviceUrl,
+      id: idpIntentId,
+      token: idpIntentToken,
+    });
+
+    const { idpInformation, userId } = idpIntent;
+  }
+
   const legal = await getLegalAndSupportSettings({
     serviceUrl,
     organization,